yes of course you can it is like a normal bike
Because the bikes they use are known as BMX bikes.
20" or 24" wheel bikes may be suitable. 24" bikes will be better for getting around but are not true BMX's (street trick or dirt race bikes) True BMX bikes are measured in Top Tube Length- all BMX's hav00e approximately the same standover. 24" BMX bikes are considered "dirt cruisers" with the exception of a handful of street trick bikes made for adults over 6'
Yes you can use a motor cross helmet for bmx riding i actually recommend it but that's my opinion
Just about all MBX bikes use 20" wheels, which makes them all very similarly sized.
The standard size for BMX bikes is 20-inch wheels, which makes all frames pretty much the same size too. Decide which kind of riding you want to do, dirt/race, vert or flatland/street, them take it from there. If you intend to use the bike to ride around in traffic and actually going places, don't get a BMX at all. Get something with a more sensible riding position and some gears.
loads of people have them you should get one there fun to use and learn tricks
A BMX bike is good for both boys and girls, as long as they want to do BMX-style riding, with jumps, tricks and that. If you don't want that, there are several bike types that are better, more comfortable, and more efficient for general riding-around type of use.
what ever size fits them for their intended uses.
When You Buy A Mountain Bike It Automatically Comes With One But BMX Bikes Mostly Have Them So You Can Have A Handle Brake For The Back Tire So If You Have One It Is So You Don't Accidentally Pedal Backwards A Hit The Brakes Instead Of Just Keep Riding
No. Skateboards and inline skates all have cartridge bearings, while a lot of bikes have cup & cone bearings. For those bikes that do have cartridge bearings, their axles are thicker than skateboards/skates.
That's all down to how hard you're riding. Most people will use more effort when riding IRL than riding stationary bikes.
Not quite, although they can be very similar. One place where they might differ is that some BMX frames oight not be set up to take brakes, while good braking is usually real important on a trials bike. It's also quite common for trials bikes to use 24" wheels, while BMX is almost only 20".