Great wall of...

I couldn't resist showing this project off. The guys were really proud of it. It started with the multi-colored domino pyramid. They boys called me back after half an hour, and had finished the wall. Of course, the part they seemed to enjoy the most was knocking it down for an audience of kindergarteners and first graders. It was pretty cool, they just tipped over one domino at the end of the row and the whole thing gradually collapsed from one end to the other like a building imploding.