when i have kids i plan on doing that to them.
also here is another good prank to do if you have multiple kids. instead of putting their names on the presents, number them. then have a master list telling what numbered presents go to what kid. this way they have to wait to open presents one-by-one. then to go one step farther, have one huge box that has bricks in it for wait, and have it numbered. they will go crazy trying to figure out whats in the box, and its not for anyone of them LMAO
children are made for entertainment and messing up psychologically