First of all, I believe it's very optimistic to have this for kids above 6 years old. Very challenging for kids at that age range. Next, we love the idea, however the quality of materials is disappointing, especially the post one.

Difficult directions to see as the print is so so small. The pieces don’t always seamlessly fit so then the marbles don’t go down by themselves. It’s a major pain to put together and takes adults 2 hours to do.

It is crazy hard to assemble. Once you get what you doing then it takes 1 or 2 hours. But my daughter loved the result.