Shoes, gravel, sand, and carpet

Every day when Avery gets home from school he stops at the front door, takes off his shoes, and dumps out all the gravel/sand. Tonight Addison took off his shoes(while on mine and Nate's bed) I asked him to please do that somewhere else. When he stood up and walked to the foot of the bed and dumped the sand onto the carpet and laughed. I know he has been watching Avery, but he needs to watch him a little better and remember to dump the shoes outside.