I have never written a bad review for a toy before but this one made me so frustrated, I just had to! This LOOKS like a lot of fun.... but the assembly directions are terrible (there even is one extra part). It took over an hour just to put this together. If you move it a centimeter, the whole thing falls apart (if you ever got it together in the first place). It is just junk... the pieces do not lock together so they literally are just sitting together.We also had a defective part in that one of the cars kept falling off the track and would not go.Also, the seller we bought it through (on Amazon) was Toysintexas. Their customer service was awful and basically refused to return the item even though it was clearly defective. Luckily, Amazon came through with their A-Z Guarantee and gave us a merchandise credit, otherwise we would have been out of luck.Don't buy this, no matter how fun it looks!!