Earth & Weather
How Does Shade Affect Soil Temperature? A Simple Backyard Experiment
Explore how shade changes the temperature of soil by comparing a sunny spot with a shaded one using everyday items like a cardboard shade…
MATERIAL COLLECTION
Cardboard
Everyday materials, clear steps, and big questions. Find a hands-on project that fits your curiosity.
Everyday materials Clear explanations Room to wonder
Engineering
Cardboard Bridge Engineering Challenge
Build and test a cardboard bridge that can hold as much weight as possible, learning about forces, load distribution, and engineering design.
Plants & Living Things
How Does Plant Spacing Affect Radish Growth? An Easy Home Experiment
Explore how the distance between radish seedlings changes their size and speed of growth. This beginner‑level experiment uses cardboard trays, radish seeds, and water…
Physics
Observing How Shadow Length Changes Over the Course of a Day
Children can track the length of a simple stick’s shadow from sunrise to sunset, learning why shadows are longest at dawn and dusk and…
Engineering
How Does Tower Base Width Affect Stability?
A wider base makes a tower harder to tip over. By building cardboard towers with different base widths, kids can see how stability changes…