K'Nex Cusom Custom Cruisers Building Set - 30-Model STEM Construction Kit (105 Pieces)

What you're getting

Build up to 30 different vehicles with the K'NEX Custom Cruisers set. You get 105 pieces to work with, so there's plenty of scope for trying out different designs and seeing what actually works.

It's a hands-on construction kit that keeps kids occupied while they're figuring out how things fit together. Each build teaches you something about how vehicles are put together, which is the sort of thing that sticks with you.