Gecko Run Marble Run Deluxe Starter Set by Thames & Kosmos – Vertical Marble Run w/Flexible Tracks, Loop & Trampoline Tricks, Fast, No-Mess Setup, Residue-Free Nano-Adhesive Pads for 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 kids love this Gecko Run set. It keeps them entertained for hours upon hours. The only thing I didn't like about it was that the ball would jump off the track. Besides that, it was very easy to put together and fun to play with

The parts are good quality, but the re-usable stickers are not. I think they may have been exposed to a high humidity environment because the sticker sheets were difficult to manipulate and the cardstock came apart. They don’t hold the weight. Its not recommended for drywall and painted surfaces. I don’t know how to rectify this. I think it might work better as a tabletop game with some sort of A-frame easel and board to attach the marble run. There are no magnets for metal surfaces. That might work well, too (i.e. side of refrigerator as shown).

Fun product, doesn't stick to all surfaces as mentioned by other reviews. Fun product for as long as it lasted.

This product is ABSOLUTELY AMAZING. My son and I had fun building it...I think I had a better time than he did. 😄It was easy to together with simple instructions, and with a guide that gives track suggestions. Once it was done, my son called his older sisters (15 and 12) to come and try it out, and they loved it. I would definitely recommend this product!!! P.S. The product say 8+. My son is 7...he was able to do with it guidance and encouragement for the little trial and error moments 😊

This thing absolutely sucks. It does not stick to ANYTHING. Even glass it falls off after a few seconds for the heavier parts. This is the first use too.... not like its been used alot. So no, I wouldnt reccomend this product to anyone. They would have been better off using suction cups.... and its past the return for me so I'm stuck with this junk. Great.

This is a favorite now, for grandsons ages 6 & 8. They love marble works, and this presented an additional challenge. I worried they might not stick - they actually stick to a window very well. I wondered if the marbles could damage the window- not a chance. They played for hours. I ordered some additional sets the following day for the next time they come. A little challenging for the six year old at first, but big brother helped. I highly recommend this set - and I think it’s best to get at least one ‘add-on’ set.

Good product

Such a clever idea but it just does not work. The kids love the idea of it and keep trying to play with it but they just get frustrated as it does not stick properly. We have tried it on glass, fridge, gloss surfaces etc and the pieces just fall off after 30 seconds or so , which is very annoying when you are trying to build a run of any length. I thought at the price that it would have been better tested.

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Super fun - a toy that my 11 old son comes back to it all the time, he tinkers with the run set ups to optimize it!

My son loves it! I’d definitely recommend

Brilliant and lots of fun