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The blocks fit so snugly onto the train that my daughter can build a tall tower and wheel it around the living room without it toppling over. It’s been a month and she still finds new ways to stack and balance them, which is more than I can say for most of her toys.

My son has had this train for three weeks and the open-ended play is exactly what we wanted—he stacks the blocks into towers, then knocks them down and starts a completely new configuration. It’s impressive how long it holds his attention, and I can already see his hand-eye coordination improving fr

My 2-year-old figured out how to balance the rainbow blocks on the train cars without help, and now he builds and rebuilds it every single morning. It's been two weeks and he's still finding new ways to stack them, which says a lot for a toddler's attention span.