Hidden Pigeon Company (“HPC) is a kids and family content company expanding the reach and impact of author/illustrator Mo Willems' best-selling catalog of children's books and intellectual property across all entertainment platforms, including television, film, digital, gaming, live events, location-based experiences, publishing, consumer products and more.

KNOCK KNOCK KIDS is a whimsical, rambunctious line of paper goods and stuff for children (AKA young humans who haven't lost any of the pixie dust we're all born with). We make fun things that help kids build confidence, express their feelings, and unleash their creativity. Not to mention laugh themselves silly. Like really, really silly. We believe kids are smarter, savvier, and wiser than adults often give them credit for. Our stuff is here to support young'uns on their own super important life journeys.