56 of 58 people found the following review helpful
Seriously folks, I can not tell you enough what a great toy this is. My 4-year old boy is almost in a trance when he gets to play with this set. We spend hours of quality time together, trying to figure out the fastest, tallest, most advanced marble run.
And it's so great to see my son challenge himself when he plays with this by himself. I am amazed at the constructions he can build all alone. This toy obviously teaches great concentration, construction and logic skills!
If I could give out six stars, I would, that's how great it is.