Little Boy and his Mom are charcters who appear in 5 books: The Adventures of Captain Underpants, Captain Underpants and the Attack of the Talking Toilets, Captain Underpants and the Perilous Plot of Professor Poopypants Captain Underpants and the Terrifying Re-Turn of Tippy Tinkletrousers,and Captain Underpants and the Sensational Saga of Sir-Stinks-Alot. Little Boy usually notices things his Mum doesn't believe him. In the future, Mum sees something, and boy says, "And I'm the one who needs a psychiatrist?" In the far future, the boy is grown up and the Mum is still seeing things.