Physics
Hard
Pendulum Wave Machine
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:30 min Materials:6 items Age range:9-12
Popular Materials
Physics
Easy
Amazing Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:20 min Materials:6 items Age range:9-12
Physics
Medium
Super Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:25 min Materials:6 items Age range:9-12
Physics
Hard
Mega Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:30 min Materials:6 items Age range:9-12
Physics
Easy
Ultimate Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:5 min Materials:6 items Age range:9-12
Physics
Medium
Epic Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:10 min Materials:6 items Age range:9-12
Physics
Hard
Cool Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:15 min Materials:6 items Age range:9-12
Physics
Easy
Awesome Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:20 min Materials:6 items Age range:9-12
Physics
Medium
Fun Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:25 min Materials:6 items Age range:9-12
Physics
Hard
Quick Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:30 min Materials:6 items Age range:9-12
Physics
Easy
Simple Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:5 min Materials:6 items Age range:9-12
Physics
Medium
Giant Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:10 min Materials:6 items Age range:9-12
Physics
Hard
Mini Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:15 min Materials:6 items Age range:9-12
Physics
Easy
Rainbow Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:20 min Materials:6 items Age range:9-12
Physics
Medium
Glow-in-the-Dark Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:25 min Materials:6 items Age range:9-12
Physics
Hard
Magnetic Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:30 min Materials:6 items Age range:9-12
Physics
Easy
Solar-Powered Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:5 min Materials:6 items Age range:9-12
Physics
Medium
Wind-Powered Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:10 min Materials:6 items Age range:9-12
Physics
Hard
Water-Powered Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:15 min Materials:6 items Age range:9-12
Physics
Easy
Spinning Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:20 min Materials:6 items Age range:9-12
Physics
Medium
Bouncing Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:25 min Materials:6 items Age range:9-12
Physics
Hard
Floating Pendulum Wave Machine Challenge
Each pendulum has a different length, which means each one has a different natural frequency — shorter pendulums swing f...
Duration:30 min Materials:6 items Age range:9-12
Chemistry
Medium
Crystal Garden
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:30 min Materials:7 items Age range:7-12
Chemistry
Hard
Amazing Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:15 min Materials:7 items Age range:7-12
Chemistry
Easy
Super Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:20 min Materials:7 items Age range:7-12
Chemistry
Medium
Mega Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:25 min Materials:7 items Age range:7-12
Chemistry
Hard
Ultimate Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:30 min Materials:7 items Age range:7-12
Chemistry
Easy
Epic Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:5 min Materials:7 items Age range:7-12
Chemistry
Medium
Cool Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:10 min Materials:7 items Age range:7-12
Chemistry
Hard
Awesome Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:15 min Materials:7 items Age range:7-12
Chemistry
Easy
Fun Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:20 min Materials:7 items Age range:7-12
Chemistry
Medium
Quick Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:25 min Materials:7 items Age range:7-12
Chemistry
Hard
Simple Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:30 min Materials:7 items Age range:7-12
Chemistry
Easy
Giant Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:5 min Materials:7 items Age range:7-12
Chemistry
Medium
Mini Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:10 min Materials:7 items Age range:7-12
Chemistry
Hard
Rainbow Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:15 min Materials:7 items Age range:7-12
Chemistry
Easy
Glow-in-the-Dark Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:20 min Materials:7 items Age range:7-12
Chemistry
Medium
Magnetic Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:25 min Materials:7 items Age range:7-12
Chemistry
Hard
Solar-Powered Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:30 min Materials:7 items Age range:7-12
Chemistry
Easy
Wind-Powered Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:5 min Materials:7 items Age range:7-12
Chemistry
Medium
Water-Powered Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:10 min Materials:7 items Age range:7-12
Chemistry
Hard
Spinning Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:15 min Materials:7 items Age range:7-12
Chemistry
Easy
Bouncing Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:20 min Materials:7 items Age range:7-12
Chemistry
Medium
Floating Crystal Garden Challenge
When you dissolve borax in hot water, you create a supersaturated solution — the hot water holds more borax than cold wa...
Duration:25 min Materials:7 items Age range:7-12
Engineering
Hard
Cardboard Robot Arm
Your cardboard robot arm mimics how real tendons and muscles work in your hand! The strings act like tendons — strong co...
Duration:30 min Materials:8 items Age range:9-12
Engineering
Medium
Amazing Cardboard Robot Arm Challenge
Your cardboard robot arm mimics how real tendons and muscles work in your hand! The strings act like tendons — strong co...
Duration:10 min Materials:8 items Age range:9-12
Engineering
Hard
Super Cardboard Robot Arm Challenge
Your cardboard robot arm mimics how real tendons and muscles work in your hand! The strings act like tendons — strong co...
Duration:15 min Materials:8 items Age range:9-12
Engineering
Easy
Mega Cardboard Robot Arm Challenge
Your cardboard robot arm mimics how real tendons and muscles work in your hand! The strings act like tendons — strong co...
Duration:20 min Materials:8 items Age range:9-12