My 4.5 year old has been taking his time these days. He can spend an entire morning building marble walkways and is so excited to show off what he's done. He also enjoys doing "balloon mazes" where he builds a layer on top of a green base and then moves the ball by tilting the base. Have fun. I also think this is the best deal out of all the kits available. I compared the number of actual ramps (instead of additional hollow elements) and this one had the most. We already have a trough and it's compatible so we could make very tall structures.
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