I had child in cast few year back - accident happen here when larger child not look where going and trip and fall on younger child. He not allow put weight on it for few week. He about 2.5 when happen.
I did mean lift him in and out of crib and he had ride wagon instead walk but not unmanageable.
I not think reasonable to exclude based on unable to fully participate. It just one of those thing and child not ill.