Which are the safest cartoon series for 4-6 yr olds? i was horrified by violence and foul language shown in some.

Isn't it weird that lots of kids love Tom and Jerry? I too, am appalled by the violence in that. CeeBeeBees, BBC's kiddie channel, has some lovely cartoons that are very educational. Tommy and Tallulah, Ben and Holly's little kingdom and Charlie and Lola are a few.