Knock-knock. Who's there? Blippo and Beep!
Blippo and Beep are a pair of silly robot friends. While Blippo is good-natured and eager, Beep is a bit more serious and practical. But when they start to share knock-knock jokes with each other, Blippo doesn't really understand how they work, and Beep begins to run out of patience!---from the publisher
48 pages 978-0593226964 Ages 4-7
Keywords: robots, friends, friendship, jokes, chapter books, part of a series, 4 year old, 5 year old, 6 year old, 7 year old
