Gecko Run Marble Run Starter Set by Thames & Kosmos, Toy of The Year Winner - 63 Piece Vertical Marble Run, Flexible Tracks | Fast, No-Mess Setup, Residue-Free Nano-Adhesive Pads, Creative Play

edit: the 8 year olds I worked with ADORED this and the 5 year olds.... some were able to figure it out and found it really interesting!!! Others kind of struggled with how it worked and gave up and lost interest relatively quickly. And found another play choice in our space. I didn't have a ton of time to walk them through it and I didn't have that many track/etc/materials for each child but. But plenty loved this!The good: I have merely tried sticking 2 connectors, a track, and a catcher to my glass sliding door to my patio and it worked great! I was thrilled. It was kinda fun as a 31 year old assistant teacher and leader of an after school care program!The bad/surprising: I was absolutely NOT read for how FAST this marble run can potentially go if you curve the bendable tracks. It can go really, really fast. Maybe that's a benefit to some. Not really here. I work with ages 5 to 8, but MOSTLY at the 5ish age range... some kids can be really sensitive to stimulus and overwhelmed so the QUITE FAST and NOISY, as well, nature of this marble run was something I was not expecting and am not particularly pleased with. Also, something about the nature of this toy is pretty hard, honestly. Predicting where the potentially fast marble is going to go next and using your imagination and guessing to figure out where the next track goes is hard. Even for a grown adult. I'm going to try to put this out for some 5 year olds and the brighter and more mature of them but I have a feeling it won't go so good. I see a return of this product in my future.A shame I'll probably end up having to return it because as soon as I saw this thing I thought "Wow!" Because I'm always looking for toys with suction cups for glass doors. I was a pre-k teacher for ages. Kids love that type of toy beyond words and it also makes what was previously a ONE USE and almost useless part of a room (just a glassdoor for only exiting) in to a play space which is useful.Ugh. Hope this works out. Maybe I"ll update it. I could see a 12 year old losing his mind over this. But yeah. Probably not for young ones.Oh, and because it's so fast you could maybe lose marbles and even do so quickly, unfortunately. Ugh.

My grandson loved this game. It was perfect for a four-year-old who loves marbles. Easy to put together and you can make different designs with it.

Bought as a gift for my 6yr old grandchild.Doesn't suction well to doors and walls with certain paint and textures but glass windows are great. Does take some skill to figure out the correct angles to get it to work without the ball turning into a projectile

The material of the product is actually pretty solid and feels like it’s made to last, which I appreciate. However, the biggest issue—and it’s a big one—is the stickers that come with it. According to the instructions, they’re supposed to stick to flat surfaces, but they just don’t. They peel off almost immediately, making it frustrating and nearly impossible to use or enjoy the product as intended. If the manufacturer could improve the quality of the stickers, this would easily be a 5-star item. Until then, it’s a decent concept let down by poor execution.

I loved the idea of these. My 7 year old son was very excited about them when he got them. I helped him set up an easy track and for the life of us couldn’t get the ball catch to stick after getting the marble to it on all but the super gentlest of landings. We were playing with it on the front of his metal locker.It’s been 5 months now and I haven’t seen him play with this since the 2nd week of having them. His older brothers (9,13) also tried various placements to see if they could get it to work properly and had issues with the sticky part detaching in use with multiple different pieces and brand new sticker pads.

Gifted for 8 yr old. Works well

Bought for grandchildren they love playing with them and critical thinking

Even on surfaces that are recommended (clean glass), it doesn't stick very well at all. It will dismantle itself as even the included marbles go down. The tops of the chutes aren't high enough, so if there's a bit too much speed, they will jump out. We messed with this for about an hour and gave up. Couldn't even get a single complete run in. Either jumped the track or fell apart in the process.