Tumbleos™ takes traditional dominos to whole new heights. Spin the spinner to determine whether you'll add to or subtract from the stack, then search your stash to find a block that works. Stack all your blocks first and you win, but watch out, your opponent might spin " tumble the tower," and you'll have to start all over again.How To Play: 1. Spin the spinner to determine whether you'll add blocks, remove blocks, or tumble the tower.2. Place the matching block(s) from your pile onto the stack–without tumbling the tower.3. Play all your blocks first to win. The nitty-gritty:•Vertical take on traditional dominoes•Includes 21 colorful blocks and game spinner•Practices color matching, numbers, counting, and fine motor skills•The perfect introduction to STEM learning