Knock, Knock, Knock, Penny!

Knock, Knock, Knock, Penny!
Knock, Knock, Knock, Penny! Fans of Sheldon on the hit comedy, The Big Bang Theory, will love this design. Sheldon's need to knock three times is a running gag on the show, especially with Penny. Big Bang Theory T-shirts, hoodies or other merchandise make great gifts too!


We've got a great selection of Knock, Knock, Knock, Penny! gifts. Whether you're looking for Knock, Knock, Knock, Penny! t-shirts, hoodies, stickers or other Knock, Knock, Knock, Penny! merchandise, Whee! Design has a large collection of fun, unique gifts to choose from. For the last minute gift shoppers, most orders ship within 24 hours. You can shop with confidence because all our products are backed with a 100% satisfaction guarantee.