COUOMOXA Marble Run Building Blocks Compatible with Classic Large Blocks STEM Toy DIY Build&Play Luxury Building Set Kids Gift for Boys Girls Age 5 6 7 8+ (Upgrade Waterwheel Piano Roller Coaster)

I love the pieces in this set. We had 1 already so we were using the special pieces to supplement our set. I only wish that the ferris wheel was permanently mounted because it comes off easily and isn't balanced. Currently, I'm trying to glue those pieces so they don't come apart, but this has already brought hours of enjoyment to the whole family (8 y.o. girl, 5 y.o. boy, miss 30s parents) in a single month

All the kids who come to our house have loved the duplo-style marble runs. Fun for toddlers to knock down, fun for preschoolers to make basic tracks, school kids like inventing more complex runs using special pieces, and teens and adults have fun making their own challenges. I’m so excited to have this set to give our family for the holidays and expand the sets we already have.The wheel piece is heavy. like another reviewer mentioned, if it falls off the supports, I might try supergluing it to some supportive blocks. And if that still doesn’t work, I will probably just set it aside. There are many nice special pieces in this set. Good value.

PROS:- includes some pieces the “official” manufacturer should consider adding- a lot of pieces for the price- some, but only some, pieces really stick to each other- it tries to be innovative and is semi-successfulCONS:- instructions are passable, but not good. I’ve built many, many products and had to stop to analyze at almost every step. Hard to imagine a child getting this right alone.- many parts are unsupported in the design. Even light use by a young child requires repair.- the “Ferris wheel” component is highly prone to popping off, and not easy to reaffix without knocking other pieces off.- Model “A” lacks enough kinetics to make balls reliably move through the track.Ultimately this is a decent value for the price, but I’d gladly have paid $10 more for a more stable and reliable design.

We added this to an existing marble run set, also bought on Amazon at a similar price point. This set is a little off. Most of the pieces are fine, but the Ferris wheel structure pieces do not fit well together, so it comes apart when using it, which often destroys much of the run if you don’t catch it in time. We have to hold down the gear/wheel structure while turning the gears, which helps somewhat, but then the wheel will disconnect from its scaffolding. The other pieces are fine, but this is the main point of this kit as it allows for an endless marble run.

Although the materials are duplo compatible, the assembly instructions are challenging for even adults. Photos are not from the best angles, making it tough to see exactly what the assembly should be without trial and error.Once assembled, she seriously enjoys working the wheel, but the big wheel has a bad habit of popping off while on use, and we adults have to strip down the model to reattach the wheel and reassemble the rest.Design is a bit weak with extra blocks (not provided, but we've got tons) needed to stabilize model in several places.Thankfully she has two Lego capable grandparents.Marbles with smiles are cute. Having lots of marbles is a great feature.Might consider offering more building options online, especially with more complete, more kids capable instructions.