Floating Grow a Bean in a Bag Challenge
⚠️ Safety Warning
Lima beans should not be eaten raw. This is an observation experiment only.
All experiments require adult supervision.
Materials You'll Need
Gather these 6 items before starting
💡 Tip: Check off items as you gather them to stay organized!
Step-by-Step Instructions
Follow these 8 steps carefully
fold a paper towel so it fits inside the ziplock bag.
Dampen the paper towel with water — it should be wet but not dripping.
Place 2-3 lima bean seeds on the paper towel, spacing them apart.
Seal the ziplock bag, leaving a tiny opening for air.
Tape the bag to a sunny window at the child's eye level.
Check the seeds daily and add water if the paper towel dries out.
In 3-5 days, you will see the seeds crack open and roots emerge!
Continue observing for 2 weeks and draw the growth in a science journal.
✅ Remember: Take your time with each step and ask an adult for help if needed!
The Science Behind It 🔬
Seeds contain a tiny baby plant (embryo) and a food supply packed inside a protective coat. When a seed gets water, warmth, and air, it begins to germinate — the process of sprouting. First, the seed absorbs water and swells until the coat cracks. Then the root (radicle) grows downward — it always grows down because of gravity, a response called gravitropism. Next, the stem grows upward toward light (phototropism). The clear bag lets you see this whole amazing process that normally happens underground! Try changing one variable at a time to see how it affects the results — this is called the scientific method!