They made four projects from Early Simple Machines.

We thought this machine would move the bubble pop through in 100 turns but it only took 96 turns

Meshing gears can be used to crimp paper.
That makes good bracelets and bows.

A stirring  machine can also be used to stir up "dinner".

This vehicle uses a worm gear to change shape.

Bob the builder


and students built  houses.