Guaranteed to leave you in stitches! Knock knock! Who's there? Thea. Thea who? Thea later! Knock knock! Who's there? Alex. Alex who? Alex plain later! Knock knock! Who's there? Beets. Beets who? Beets me! If you can't resist shouting out "Who's there?" on cue, The Everything(r) Kids Knock Knock Book is for you! Features hilarious sections such as: Once Upon a Knock Knock When Fun Comes a Knockin' Tied Up in Knocks Knocks Knock Knock Your Socks Off Who's That Knockin'? Packed full of puzzles, games, and activities, The Everything(r) Kids' Knock Knock Book proves that laughter really is the best medicine!