My students and I are loving the IMR Grand Prix. I am using it to teach Pre-K through 6th graders about gravity, friction, probably, momentum, energy transfer, and so much more. Once put together it is sturdy. Not very easy to move around, so if that's something you need to do with it, I'd suggest building a platform with wheels. But if that's the only thing negative I can say about it, I'd say that's pretty good. I highly recommend!

Started with the Grand Prix then I added a ton of extra packs along the way. 15 feet and 1/2 inch tall

Starting with the Grand Prix, then I kept on building and building.

Delieved in two days, 11 year set it up and works like advertised. So far we have enjoyed it to the max. Know we just need to have some friends over for some marble racing.

Easy up, easy to take down. Instructions were so easy to follow. I did not have room to set this up in my apartment so I used a table at our laundry mat. I soon had people racing marbles while waiting for their clothes. Great fun!

Best marble racing track ever. My kids are 16 and 14 every day since New Year’s marbles been going down the track. We have spent hours laughing and cheering on our marbles I bought the Grand Prix track and some of the add-ons. The supports get a little weak when you reach 7 feet high but overall a great product

Have to say, this was not cheap but well worth it. So I purchased the Grand Prix version. Lots of pieces with a a few extra of nearly everything even when the thing is fully up. surprisingly sturdy. First time building had a little learning curve but now I’m a pro and making cool imaginative tracks for the kids . The kids LOVE this. Definitely glad I purchased it, may even buy some extra pieces to make the runs monstrously big.

The IMR Grand Prix is significantly larger than I thought, and my nieces and nephews LOVE it! It comes with extra pieces so you can build your own creations too. I was disappointed that my instruction book came ripped right out of the box. It would also be helpful if the pieces were labeled better and pre-sorted. There are tiny little Ls or Rs to differentiate between what piece you need, and most of the pieces came bunched together in a GIANT bag! It would be nice if each category was in its own bag or if there were different bags based on what set you’re working on like with legos.

I am a mom of 3 boys, age 8, 5, and almost 2

They are everything little boys should be, and as such, very little holds their attention for an extended period of time. We would watch marble races on tv and they loved those, so when I saw this, I knew I had to get it and hoped it would live up to my expectations. It exceeded them.

My older two boys and I spent about 90 minutes assembling, my 8 year old did each step (until the final 10 because he was too busy sending marbles down the track!) so assembly is really easy. In between each new junction, we’d pause to test it out with my 5 year old, so assembly would have been quicker had I been doing it myself.

It’s been 3 hours and they haven’t asked to watch tv and haven’t said they’re bored. Three. Hours. We are having so much fun and they are so proud of themselves for building it. If I could give this 10 stars, I would!

I sent my brother a video of my boys playing with it and he immediately called and asked where we got it… he’s a whole adult and I’ll be getting him one for his birthday now!

If you’re on the fence, just go for it!

This is a very well made product, and as a child at heart, I love racing the marbles and building the track!

Fantastic Marble racing set. Assembling it with the instructions felt like putting a Lego set together.

Awesome marble run. This is probably the 6th-7th marble run for my kids and this one is the best. If your kids love marble runs, this is a great purchase.

Love it! Great track set. We have all sorts of marble tracks, but this is the best by far!

Ran into an ad for this and was thinking it might be a gamble. It’s pretty rare that something that looks big online is that in person.

This thing is big and so dang fun. I enjoyed putting it together (once I figured it out because apparently I think I know better than the instructions 😆.)

I will say the images in the instructions are hard to read. I don’t think I’m old enough to worry about my eyes…I think.

My kid was playing with it as I built it. Every new track he’d run the marbles through again.

The parts are great quality. I particularly love the marbles. I do t know what the material is but they feel great and make a lovely *tink* sound as they go down the track.

100% happy with this and look forward to buying more parts so we can make it even bigger.

Materials are well-made & can really take a beating from my young kiddos.. but most of all, it's fun af. 100% customizable & easily assembled. My 5yo hasn't stopped waking me up to sounds of rushing marbles since I built it. Yay? loll

It's a very good set, it works perfect for my youtube channel! If you wanna know what my yt channel is, search up @bluiemarbleruns

This set is incredible. My 7, 6, 4, and 2 year old sons absolutely love it. It's well made, can tell it is very durable, and it is withstood my 2 year olds best attempts to destroy it. I highly recommend the IMR Grand Prix and will be buying more of their expansions in the future.

This is a great set for our Youtube channel (NovaThrust) it is very high quality plastic and the obstacles are well thought of. We are going to have many tournaments with this one. Thank you.

The track is great. Unfortunately some pieces were missing. I bought 2 grand prix set and from my second set I had some pieces that were not included. Overall I think this is one of the coolest sets ive seen. Also, Ive seen some scratches from multiple pieces ...I did not like that. The set is good by itself, the racing pieces are great, and you will have so much fun.

Excellent fun for the whole family. Bit of a learning curve to build it, but once you are going it is easy.

This set shows what the system can do. Race time is about 30 seconds.

Exactly as described.