My nephew is nearly 4, and he has a hard time listening to adults, even to his big sisters. My niece got a dwarf hamster for getting good grades, and everyone made sure to remind him that he was not to touch the hamster. He is very rough with little animals, but he has a pit bull at home so maybe he's use to playing rough? Anyway, my mom was over at my sisters (his mom) helping her move, and seeing as how they have no furniture, they left the hamsters cage on the floor.
My nephew disappeared, and when my mom went to look for him, she caught him with his hand in the hamsters cage SQUEEZING her. She screamed at him and he dropped her and pulled his hand out, which caused the gate to close. Mom says the hamster looks fine, but still.
My sister scolded him and sent him to a room that had a mattress in it and told him to lay there and that he was grounded. His dad? He comes in, tells him to get his shoes on and come outside, and my sister looks to him and says "I just grounded him."
He replied "I know." And walked out.