Rollercoaster and Dominos in action

Jacob told everyone who asked that he wanted a rollercoaster and dominos for Christmas. It took us awhile to figure out what he meant. The marble is placed at the top of the "rollercoaster" and down it goes, while Jacob yells, "go marble, go!" It knocks down a domino when it exits and one after the other, they all go down. Thanks for the fun toy Meme and Papa!