Invention Saturday

This morning I couldn't figure out what Mike and the girls were up to. They had been in Madi's room all morning. When I went up there I saw this...an invention they had been working on. (The video is much more impressive!) But they had a baby doll go down a zip line from the top of the door, that hit a book, that triggered a ball to role down the golf clubs, that knocked over a line of dominoes. It was pretty cute!