K'Nex

K'Nex is the toy building system which can be put together by wide variety of pieces. This sets designed for kids ages 5-12. Both of my girls love it! It is still a little to hard and complicated for Ashley ( she is 4 1/2), but easy to put together for Emily. Sometimes she would follow the instructions and sometimes create something on her own. 

This was their creation. Tried to make a wind mill and put it under the fan. Turned it on on high and watched the windmill spin.