Tubation Wheels

My son figured out how to snap the tubes together on his own within ten minutes, and now he's constantly rebuilding his little cars into something new. What surprised me is how well the pieces hold together once the wheels are on, even when he sends them flying across the kitchen floor.

The wheels roll so smoothly that my kid builds a ramp and sends his tube creation flying across the kitchen floor. It's easy enough for him to click the pieces together himself, which keeps him busy for ages.

My 4-year-old figured out how to snap the tubes together on his own, and once we added the wheels he just kept rolling it across the kitchen floor. Getting the pieces apart takes a bit of tugging for small hands, but honestly that's the only thing I'd change.