Today's challenge was to help Jack and Jill clean up the park. They had a cart and brooms and wanted to have fun doing it, quickly. The Lego Ed kits comes with the full story, build instructions and ideas for making changes. We almost always do the Lego ideas and then Taka will spend an hour or so making his own modifications. By maiing the changes in the drive and driven gears and letting the kiddo's play with each version they really "get" what the differences are in the ratios. I love it when learning is so easy and it's always great fun!