Our playful take on this old-school classic combines witty well wishes with colourful animation that seems to pop right off the page. Obviously, it's a flippin' way to say "you nailed it!"
* For graduation gift ideas, Knock Knock stuff will get you major kudos
* Interior reads: Rah rah rah; Hip hip hooray; Three cheers for you!!!
* Paperback, 208 pages; cardstock sleeve