Kid's toys have hit critical mass in terms of coolness. I think we've hit that point that no toy can't be made if there's consumer demand for it. But, I think there's a lack in the creative toy department, and littleBits feels that way too.
The company just released a new set called Gizmos and Gadgets, which will let the user create little minibots that can draw, race around, or whatever they want that comes included in the box.
Sandbox, people...sandboxes are for building.