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!
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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. You can shop with confidence because all our products are backed with a 100% satisfaction guarantee.