"We love this set but it has a problem running. First about the build. The building itself is repetitive so it is not good for children alone but the kids can enjoy putting together the small elements like the cotton candy stand and the ticket booth while the grownups put together the pillars. Once up and running it's great fun. You can coordinate the two cart trains (correct term?) So they don't run into each other so there's more to this than watching it go round and round. I would have liked it if they made it easier to break into two pieces for storage but it can be done. On the down side, the chain that operates the motion is a problem. From the beginning it didn't work well with the prescribed number of links. I removed about 5 links and then It worked great for about two weeks. We have the motor and the motion does loosen some of the track connection so they need strengthening after play. After a couple of weeks of about 5 to 10 minute of play a day on average the chain started making clinking noises and jerking the carts. Today we actually had a "casually" when a cart fell off the tracks :o. Now I'm having trouble finding the sweet spot. How long the chain needs to be? Contacted customer service but didn't hear back yet. Hope lego agents put a comment here so other people who have this problem can see it"