Children build carts using cardboard and bottle caps, then glide them down from heights. Through this activity, they explore gravity, motion, friction, and balance in a fun and practical way.
Older game
Divide the children into groups of 2–3. Begin by telling a short story, such as being engineers designing carts to deliver supplies down a magical hillside or building racing carts for tiny creatures, to spark imagination. Give each group cardboard, bottle caps, straws, and other materials to construct a simple cart. Explain that the cart should be able to glide smoothly when released from a small height. Encourage them to experiment with different shapes, wheel placements, and weight distribution to make their cart move faster and more steadily. If children have difficulty, give hints such as: How can you make the wheels turn freely? How does the cart’s weight affect its speed? How can you balance the cart so it doesn’t tip over? Make sure each child has enough time to build, test, and enjoy their gliding cart while exploring concepts of gravity, motion, friction, and balance.