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
Popular Materials
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
Engineering
Medium
Ultimate 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:25 min Materials:8 items Age range:9-12
Engineering
Hard
Epic 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:30 min Materials:8 items Age range:9-12
Engineering
Easy
Cool 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:5 min Materials:8 items Age range:9-12
Engineering
Medium
Awesome 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
Fun 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
Quick 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
Engineering
Medium
Simple 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:25 min Materials:8 items Age range:9-12
Engineering
Hard
Giant 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:30 min Materials:8 items Age range:9-12
Engineering
Easy
Mini 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:5 min Materials:8 items Age range:9-12
Engineering
Medium
Rainbow 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
Glow-in-the-Dark 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
Magnetic 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
Engineering
Medium
Solar-Powered 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:25 min Materials:8 items Age range:9-12
Engineering
Hard
Wind-Powered 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:30 min Materials:8 items Age range:9-12
Engineering
Easy
Water-Powered 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:5 min Materials:8 items Age range:9-12
Engineering
Medium
Spinning 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
Bouncing 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
Floating 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
Engineering
Hard
Hydraulic Cardboard Excavator
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:30 min Materials:8 items Age range:9-12
Engineering
Hard
Amazing Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:30 min Materials:8 items Age range:9-12
Engineering
Easy
Super Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:5 min Materials:8 items Age range:9-12
Engineering
Medium
Mega Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:10 min Materials:8 items Age range:9-12
Engineering
Hard
Ultimate Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:15 min Materials:8 items Age range:9-12
Engineering
Easy
Epic Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:20 min Materials:8 items Age range:9-12
Engineering
Medium
Cool Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:25 min Materials:8 items Age range:9-12
Engineering
Hard
Awesome Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:30 min Materials:8 items Age range:9-12
Engineering
Easy
Fun Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:5 min Materials:8 items Age range:9-12
Engineering
Medium
Quick Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:10 min Materials:8 items Age range:9-12
Engineering
Hard
Simple Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:15 min Materials:8 items Age range:9-12
Engineering
Easy
Giant Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:20 min Materials:8 items Age range:9-12
Engineering
Medium
Mini Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:25 min Materials:8 items Age range:9-12
Engineering
Hard
Rainbow Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:30 min Materials:8 items Age range:9-12
Engineering
Easy
Glow-in-the-Dark Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:5 min Materials:8 items Age range:9-12
Engineering
Medium
Magnetic Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:10 min Materials:8 items Age range:9-12
Engineering
Hard
Solar-Powered Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:15 min Materials:8 items Age range:9-12
Engineering
Easy
Wind-Powered Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:20 min Materials:8 items Age range:9-12
Engineering
Medium
Water-Powered Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:25 min Materials:8 items Age range:9-12
Engineering
Hard
Spinning Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:30 min Materials:8 items Age range:9-12
Engineering
Easy
Bouncing Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:5 min Materials:8 items Age range:9-12
Engineering
Medium
Floating Hydraulic Cardboard Excavator Challenge
Your excavator uses hydraulics — the science of using liquid pressure to create force and motion. Water cannot be compre...
Duration:10 min Materials:8 items Age range:9-12