As the series is aimed at a pre-school audience there is no on-verge violence. The Meanies are harmless villains who instead use the problems to solve the morals, and the Numberjacks defeat the Meanies using "Brain Gain" which doesn't harm them, rather just sending them away (although with the Puzzler, he "explodes" in the first series, but does it himself).

The CGI animation does go on the verge of the uncanny valley scene. Spooky Spoon and the Problem Blob are the best examples.