Brutus tries to do this. He likes to bite ears when he gets excited. If you consistently tell him no and immediately put him down, If he is on the couch he goes right on the floor, as this is a priviledge he will get the message. I do not usually allow floor play because Brutus views this as the kids are now equal to him and he pounces. Just keep calm and consistent and it will get better. Also at this age, they are little bullsharks and they will try to bite and nip. I have a nephew that is 2yrs old and I found Brutus to be very rambunctious so I put him in his harness and leashed him whil my nephew was over and Brutus learned quick the type of behavior that I expected from him. If your worried about your kids you could try this. Bulldogs learn very fast.