Preschool Physics (a.k.a. Having Fun Playing with K'NEX)

Talia just discovered my brother's old K'NEX set a few days ago... this is the first thing with instructions that she chose to build:

A Ferris wheel. We followed the instructions (easy-to-follow pictures) and little by little it came together.

The coolest part was that it really moved once it was all put together. There's a center piece that can be wound that then will propel the wheel around in a circle for a bit.

Or a rolling robot:

Or a combine that works with the addition of a rubber band:

I suppose this could be considered preschool physics... ;) but it was a lot of fun, if nothing else.