Personal safety while riding is of the utmost importance. A full suit of armor would be nice but are difficult to find and a little bulky. It would prevent a lot of bumps and bruises sure to be acquired along the way. However, a more logical solution would be a helmet and pads. They come in all shapes and sizes. Assortments of styles are available for boys and girls. Ensure that the fit is right and teach your child the importance of their headgear. Allow them to choose the one they want if possible. If it is something they really like, they will be more likely to wear it without a fuss.
Making the bike more comfortable is also something to consider. There are many types of seats, hand grips and bar covers. They come in all shapes and sizes. If the seat is uncomfortable after adjusting it several times, you might want to consider something with more padding. Larger seats are generally more comfortable.
Some hand grips offer more padding than others. Different colors and textures are available, as well. Matching or mismatching they add personality to the bike. Bicycle gloves are a good buy as they protect hands during falls and can prevent sweaty hands from slipping off of the handlebars. Reflectors are generally a part of the package with most bikes. However, if your child plans to ride at night frequently it might be advisable to purchase additional reflectors or a reflective vest as an added precaution. Water bottles are convenient on hot days and long rides. They too come in many shapes, sizes, colors and styles. Most of the ones designed specifically for bikes also include a gadget that attaches the water bottle to the bike to hold it in place.