How to avoid ur lo from bump if he very active?

Hi mommies, my son just turn 2 yo now and we have send him to childcare for speech delay issue since he was 23months old. But our concern is he often got bump. My son is very active, so he prefer run here run there, explore all thing around him, can put anything into his mouth also. He doesn’t know which one is danger or not. During at home, there always have 1 ppl to follow him for protect him. At school, we understood that can’t have 1 ppl to see and follow him as the teacher also have responsible with other kids. Is Anyone have the same issue with ur kids? Is there any suggestion how to teach your child to more discipline, what he do must be very carefully and avoid got hitted wall/ desk/ others. Thanks 🙏🏻