14 year old has a cast for broken thumb... can he still did the water activities

I dont know if the waterpark has a policy for that but Im pretty sure your doctor wouldnt like it unless you put a bag over the cast

Or unless you have a waterproof fiberglass wrapped cast. Must bag any other cast tightly cause they will fall apart and contaminate the water .

Ive seen other kids with cast in the water there water proof cast that the orthopedic puts on