My 2 1/2 year old son mysteriously began using violence when he is not exposed to other little kids often to pick it up from them. I could not figure out where in the world he was learning terms like "I'm going to stomp you." He also began hitting and stomping on the floor, threatening to stomp me. I couldn't figure out how in the world my usually sweet little boy was learning to be so angry. Then I watched the show with him one day (he usually watched it w/his grammy/papa) and I heard the characters using these terms and hitting each other. Now my little man has a terrible problem with stomping, hitting, kicking, or acting in a violent manner whenever he does not like something or does not get his way. I think the opening credits of the show should make it very clear that the show is NOT for children under a certain age, because little tikes are not cognitively mature enough to pick up the message. In fact, all it did was TEACH my son the very behavior it was advocating against. I'm a little upset that I now have to un-train my son of this behavior. Hitting and violence is something the parents should teach, not something they learn on a child's cartoon by watching the characters act out in a violent manner. I would not recommend it to any child under 5.