A Fracture is a break in the structural continuity of bone. It may be no more than a crack, a crumpling or a splintering of the cortex; more often the break is complete.
Childhood is the time when children are the most active physically. Constant engagement in activities like running, playing, etc. invite a risk of bone fractures. This is also the time when the bones grow the most and hence require adequate amount of minerals to do so. But before going into the depth of the causes of bone fractures, let us first broaden our knowledge w.r.t what a bone fracture actually is.
A cast or a splint supports and protects an injured part of your body. The cast or the splint prevents the injured area from moving, so it can heal faster.