Review on Mindblown Marble Run Pieces by Discovery by Frank Tyrance

If this toy deserved the Nobel Prize it would be the WORST TOY! The parts are either too tight or too loose. And instead of "marble track" it should be called "marble fly" because the marbles keep flying off the track. However, if the balls manage to stay on the track, they will get stuck in the hole. The caterpillar parts do not fit the blue parts and you cannot assemble them without instructions. I didn't even finish building it because I just couldn't put the pieces together. It doesn't even look like a good marble walkway!