I know a kid who is 16 and still believes in Santa Claus. I never asked him about it but my mom and his mom are good friends. His mom is crazy over protective and wont let him get his liscence and a bunch of other stuff. According to her he still believes in St. Nick. I dont know if its true or not. Honestly it wouldnt suprise me. He isnt retarded or anything just kinda naive and believes everything his mom says.