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.

My kids love the magnetic runs at the children’s museums, so I thought this would be fun. I guess I didn’t read and thought they were suction cups. They are sticky… which is fine… but I can’t see them lasting long, especially when you have to peel them off a few times to get the placement perfect. If there are other backing options, like suction cups or magnets, I think this would be a home run. My kid lost interest quickly because adjusting them because a burden. We used our back sliding glass door, but I can’t think of anywhere else we could use it.

I bought this last year and still haven't even used it. I'm making a review a year later just because I don't want others to waste their money if they're not patient like me and don't want to spend a whole entire hour setting it up. This is not a easy assembly whatsoever so in my opinion it's frustrating. It is not fun. The functionality sucks. Not to mention the magnet strengths is not strong it barely sticks unless I got it defective one. I just simply don't recommend especially for children under five.

These seem like they’d be fun, but the stickers they supply to stock to the walk do not work, pcs fall down and don’t stay on the walk. Tried adding done heavy double sided tape but only lasts for a while

Bought for grandchildren they love playing with them and critical thinking

Gifted for 8 yr old. Works well

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.