Leopard Geckos make great pets for kids ages 10 and up. They're friendly, docile creatures by nature, but it's always best to supervise children when they're handling the lizards because leos can, on rare occasions, bite. This really only happens if they mistake a finger for food -- which isn't common -- or if they're squeezed too tightly while being held.
It might take time to earn your gecko's trust, so start by letting it approach and investigate your hand before grabbing and holding it. Kids and adults should be careful never to handle a leopard gecko by its tail (it could break off) and ought to avoid any sudden movements in order to make sure skittish geckos don't become frightened. Don't keep leos out of their habitats for extended periods of time, and be sure to wash your hands before and after touching them.
Because they're nocturnal, leos don't provide too many fireworks during the day, but they're often active and entertaining at night while feeding and exploring.