Don't think you can, unless you pay someone to build you a 24" wheel round a fixie hub. Fixed gear bikes are almost only used for road/track cycling, while 24" is MTB DH/ Dirt territory, where a fixie would be really awkward.
Easiest kludge is probably to find a bike with 24" disc brake wheels, then slap
on a Tomicog. I'll post a link about them. Remember that you need to ditch the rear derailer, and that the frame has to have horizontal dropouts.
you can buy a fixie bike in any local bike shop
Ebay, craigslist, yard sales.
Fixie bike are bikes (usually road bike frames) that have a fixed rear sprocket which allows you to pedal forward like normal, but does not allow you to just coast . If you pedal backwards it goes backwards if you pedal slow it will remain slow. The whole point of a fixie is to eliminate brakes shifters to simplify a road bike.
One can purchase a Fixie bike from Walmart for as little as $100. They can also be purchased from both Amazon and Ebay or in the UK one can buy from Halfords.
U can buy one on Craigslist (used)
Kinda-sorta. There are a couple of trikes, (like bigwheel) with the pedals stuck solidly to the front hub, these would be fixies, and for kids. Apart from that, fixies tend to be adult sized. It'd be entirely possible to build a kid-sized fixie, by simply building up a kid-sized rear wheel around a fixie hub. But I can't really see the point. A single-speed is almost as durable, and a lot easier to ride.
There are a few dirt bikes that you can buy that are cheap. Some generic dirt bikes you can buy are 200 CC, Yamaha and you can have bikes shipped to you from China.
Fixies are more difficult and more dangerous to ride than Single-Speed/coasting bikes, so its' very rare to have fixies intended for kids to ride.
Considering that a fixie hub can be built into any size rim, you can have a fixie in any size - as long as you're ready to pay for having a wheel built.
PowersportsMax is a good place to buy dirt bikes online. If looking for a store to buy dirt bikes at, simply go to the local dirt bike store, as it varies from location to location
The cast of Fixie Dave - 2008 includes: Dave Nice as himself
The most convenient place to buy pocket bikes is on an online store. Most pocket bikes are specialty products and that is why it is easier to buy them online, directly from their manufacturer.
Fixie Dave - 2008 was released on: USA: 30 April 2008 (festival premiere)