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The Thames & Kosmos Gecko Run Starter Set is a 63-piece marble run kit featuring flexible rails that attach to smooth surfaces using residue-free nano adhesive pads. Designed for quick, clean setup without bulky supports, it encourages creative engineering and problem-solving. Made from renewable materials, this award-winning toy offers endless configurations and hands-on physics learning for ages 8 and up.






| ASIN | B0CRCKNN51 |
| Assembly Required | Yes |
| Batteries Included | No |
| Batteries Required | No |
| Colour | multicoloured |
| Country of Origin | USA |
| Customer Reviews | 3.9 3.9 out of 5 stars (442) |
| Date First Available | 16 May 2025 |
| Educational Objective(s) | Problem Solving |
| Generic Name | marble run |
| Included Components | 5 sheets of nano adhesive pads (40 pads), 7 metal marbles, Plastic parts for tracks and tricks |
| Item Dimensions LxWxH | 25.1 x 6.6 x 28.4 Centimeters |
| Item Weight | 408 g |
| Item model number | 550201 |
| Manufacturer | Thames & Kosmos |
| Manufacturer recommended age | 8 years and up |
| Material Type(s) | Plastic and renewable raw materials |
| Model Number | 550201 |
| Net Quantity | 1.0 Count |
| Number of Puzzle Pieces | 1 |
| Product Dimensions | 25.15 x 6.6 x 28.45 cm; 408 g |
| tech_spec_battery_description_toys | No batteries required |
M**A
I bought 3 of these for my grandson's they spend hours playing with it. The stickers aren't as sticky as I'd like so I used tape too. But apart from that even the adults love it. Excellent product for kids and adults too 😆
A**Y
I bought this for my kids to paly with on rainy days! I'm so shocked that it sticks to everything ! You could literally take this on the train and keep your little ones entertained on the longest of journeys ! It even sticks to textured wallpaper, which only proves the quality, had this product for a while now and it's very robust. I have 5 children and apart from losing the odd piece what we do have is still in excellent working condition ! Very well made, and a fantastic product ! Thank you :)
G**D
Only tried it on our window so far, but love it. Some review caution about the stick, but not a problem for us yet. I’m guessing it works better on some surfaces than others. We’ve repositioned again & again on window & no problems at all with the stick. When you open the box, it’s best to have an adult attach the nano-suction pads. After about 10 minute prep, you’re ready to go! We got this toy on sale and I’m thrilled with it. It was perfect to get my 9 yr old off electronics & into creative play on a boring snow day home from school. He refused to read instructions, but figured out most of the pieces/assembly on his own. We’ll have to explore the few levers/mystery pieces this weekend!
M**S
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.
S**M
My Son loves these and sticks them on his window for a marble run!