Big & Small is a British children's television series aimed at preschoolers. Big & Small is a co-production between Kindle Entertainment and 3J's Productions produced in association with the BBC, Treehouse TV, and Studio 100. The first series was deemed a success worldwide and a second series was commissioned by the BBC. The show is a live action comedy for preschoolers, and follows the lives of puppets. Big & Small Online, a section of CBeebies Online, won a Children's BAFTA in 2009 for the best interactive content.

Worlds collide when Henry makes plans to spend Saturday on the sofa watching a "Gross Class Zero" marathon — and his favorite characters come to life!