We always soaked our daughter's casts off the night before the appointments. It was hard at first, but once we got the hang of it, it was nice because then she got a real bath afterwards. The skin under the cast will be sensative, so if you remove the cast the night before, be careful not to touch it too much. TIPS To keep the cast clean, try putting a sock or tight over it. I gave my daughter sponge baths while she was in casts, but I have heard of people wrapping the cast in a plastic bag to give the child a regular bath.
Sweat pants work well to go over casts.
Also, pants with snaps because you can leave part of it unsnapped. You may want to give your child Tylenol right before casting to ease discomfort. Bring a toy or security object with you to the cast changes. Your child will probably need more cuddling and attention on cast changing days, so, try to schedule appointments at times when you can accomadate. Be sure your child's diaper is fitted properly to aboid leaks.