Find and use materials to build a mock up of the machine. So far, my kids have been successful with a LEGO catapult and have discussed how they could use the LEGO NXT (or EV3 which was just released) kit to make another type of machine called a centrifugal- which needs a motor. Of course you can find kits to build catapults and trebuchets (this one is picture above).
- a shoebox
- pencils (or other strong stick)
- masking tape
- rubber bands
- egg carton cups
Join the iHN in their five day Hopscotch Series to see what other members are sharing this week!