A good wooden version of the classic marble run game. My kids love the set so much I bought two (cheaply) so they can build an excellent run.You can change your design everytime as blocks are just balanced on each other. Suitable for age 3 upwards with help and a little patience, but fine for older kids to play on their own. It is a very good engineering based toy good for a bit of brain thinking, problem solving etc.There's nothing like letting kids learn by trying something out and having to fix any mistakes. You can't go wrong really with this toy, and there is something lovely about wooden toys, and toys you can enjoy with your kids.