- JIXIn 3in1 Marble Runs for Kids 4-8/Building Blocks Compatible with LEGO DUPLOS for Age 2-5/Marble Run for Kids Ages 3-5 STEM Toy Set with 164 Pcs Classic Big Block/Gift Toys for Kid Ages 3 4 5 6 7 8+

Hits the main goals: duplo compatibility, ability to build different marble runs. I have an autistic 3.5b year old. He loves playing with it, but can easily get frustrated if things don't work or fall down. So some things to keep in mind: The instructions as is don't produce stable structures. They will fall down easily. If that's the kind of thing that will upset your child / cause a meltdown: build stronger structures, with more redundant support, cross connections for additional stability, etc. This set works with other Duplo bricks so you can get as creative as you want. Couple things I wish they did: add a connector at the bottom of the ingress of the funnel pieces, so you could securely connect them to the where the ball comes from. Add a connector underneath the other side of the u-shaped pieces, again for better stability more longer bricks to create more stable structures.

There are not enough stars for this great marble run set! I was a little worried about purchasing an off-brand Lego/Duplo set as we had tried a non-Lego block set in the past and they were cheap plastic with sharp edges that either didn't stay/fit together or were impossible to pull apart. This set though was absolutely perfect! You couldn't even tell the difference between these and the official Duplo blocks! They look and feel exactly the same and fit together perfectly. They also have lots of fun pieces with tall towers and all kinds of curves, slides, and marble drops. If your child loves playing and building with Lego/Duplo, then these are an absolute must have! :-)

Instructions were a bit hard to understand as they were pictures. But we got it together. My daughter loves these and they are compatible with duplos! They are fun and great value for the money!

We had a blast with this! Was missing a few items but seller was notified and corrected the missing pieces. Very good company. I would order this again for a child.

I bought this Dinosaur Marble Runs for my 3-year-old son, and he is absolutely obsessed with it! He really loves dinosaurs and building things, so this toy was a perfect match for him. The set is compatible with Lego blocks, which is great because we could easily add it to his existing collection. The dinosaur theme adds a fun and creative twist. Plus, it's durable and easy to build, so even at 3 years old, he can put it together with minimal help. Overall, this toy keeps him entertained for hours, and I love that it encourages creative play and learning. Highly recommend for any little dinosaur or building block fan!

This set is cool if you can get it put together and get it to stay together. Good luck with that, though! The instructions are not clear or easy to understand. The yellow A pieces and the yellow C pieces are not clearly labeled in the instructions. I didn't even realize there was a difference until I couldn't get The pieces to fit together correctly. The pieces do not click together well and will fall apart at the lightest touch. The egg shaped marbles are stupid and don't roll well. Because they don't roll well, they shake and the motion makes the whole entire track fall apart when you try to play with it. This is a very poorly designed marble run and I highly recommend not buying it!

I bought this for my 4 year old so he could have something similar to his 6 year old brother like the National Geo Marble Maze Runner. He was not a fan of it, it did not hold his attention, he enjoyed playing with the National Geo one. Also, the pieces would not stay together which was old because it came with a Lego base but they kept breaking. Great idea, not so great design. I decided to return it.

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