So disappointed to see that Tinkertoy does not put out REAL Tinkertoys anymore. I thought they would be compatible to other sets we have, but I was sorely disappointed. Not the sellers fault, it's the manufacturer.
While not the awesome wood tinkertoys i remember from my childhood, these are still pretty good. There are some that my son does need help with, and he can't follow the directions at 3 by himself. but its a good product to do with him. I look forward to seeing him grow and be able to build more with this toy.