World’s Smallest Working Roller Coaster


The world’s smallest roller coaster that actually works!

Tiny track upon which a 5mm steel ball rolls along to the end.  Push out and pop together, full instructions included.

Item will be shipped in 3-5 business days
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The world’s smallest roller coaster that actually works!

I have sold over 2500 of these and  nobody has EVER challenged its eminence.  A true credit card sized roller-coaster kit.  just 85mm x 53mm in size, all parts push out (With care) and creates a little roller coaster track upon which a small 5mm ball bearing (2 supplied) rolls around the curvy track and right to the end…  

Has a strong outer frame for shipping, You pull this frame off when you assemble the coaster (Watch the instructions) and includes graphics on the front and a sticker on the back with a QR code on how to assemble it if you need it.  Looks fab

No glue, nails or sticky stuff required, takes just a minute to assemble.

See it working at

One of a range of World’s smallest working wooden kits and card sized items I have designed and am selling  through SHOP NOTTINGHAM  including catapults, crossbows and loads of other miniaturised stuff.

Designed and made by me, AJ Booker, in Nottingham, UK, out of Laser cut MDF and shipped to you. Now shipping in a sturdy reinforced envelope, so it arrives fresh and wholesome, even though its made of wood!

Please note this item requires a little care in assembly and is NOT suitable for children under 6 years of age due to tiny parts and its fragility if roughly handled.  Note that the design may vary slightly from the one here as I am continuously improving it for better running.


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Shipping Policy

I am delighted to sell you my amazing kits but please be aware that these are miniature working kits and not suitable for children under 6 years of age. catapults really throw things, crossbows really fire, larger kits use miniature nuts and bolts (complete with tools).

most ideas are in stock but occasionally it may take longer than the 3-5 working days to get a kit ready for you.  If you are buying at short notice for a special occasion then please contact me first.

Refund Policy

If a kit arrives damaged, unable to be assembled then please email me enclosing a picture of the kit and I will send you out a replacement free, including free postage.  Note that some kits, like the world’s smallest bike, are very delicate because they are so small, so breakages need to be our fault, not yours!

Cancellation / Return / Exchange Policy

All orders can be cancelled up to the day of shipping provided you tell me before they are sent out.  If items have been specially made for you as they were not in stock, then you will be charged 40% of your kit costs as these kits may not be required by others. 

Standard orders can be returned for a full refund (excluding postage) , but you will have to pay your postage back to us and the item must arrive in resellable condition.

Partially built kits cannot be returned unless faulty. (Bits do not fit together as advertised) 

Personalised kits that cannot be sold on to others, with your name or logo on, cannot be cancelled or returned for obvious reasons.

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