⛓️ Chain Reaction Machine

🔊Let's build a crazy machine that does one tiny job the long way round!

⏱️ 45 minutes💲 free●●○Grades 2nd–8th🏆 Big Challenges

• 👶 Small parts! Keep them away from little brothers and sisters.

Gather first

• Dominoes · 10 or more (or small books, blocks or folded cards)
• Some books · a stack
• Cardboard tubes · 1, cut in half the long way
• A marble
• A toy car
• A small bell (or a tower of paper cups to knock down)
• String or yarn · a short piece
• ✂️ Kid scissors
• 🩹 Tape
• 📏 A ruler

The big idea: A little push sets stored energy free, and it passes from one thing to the next.