It depends. If the cartoons don't violate any copyright or defamation laws and are created within the bounds of legal and ethical standards, they can be legal.
Spoon cartoons can be extremely funny! They might play with the shape and functionality of spoons in unexpected ways, or use spoons to represent characters in amusing situations. The level of funniness depends on the imagination and sense of humor of the creator.
I think 'Laughing Bones' is a funny orthopedic cartoon. The humor comes from the comical way the characters handle their orthopedic challenges and the funny dialogues between them.
There's 'Hee Haw' which is funny because of its corny jokes and simple but charming comedy. The down-to-earth nature of the characters and their antics make it enjoyable. Also, the music and skits add to the fun factor.
Well, 'Superbook' is one such cartoon. It's funny because of the way it presents biblical stories in a lighthearted and relatable way, with cute animations and comical situations.