The Numberblocks are painting each other on their canvases, but Three has painted Two with one too many blocks. She realises her mistake and disguises herself as Two to convince the other Numberblocks ...

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, When I was 16, Square as a box, And guess what, I’ve got 16 blocks… Square. Really big square. 16! 10 and 6 ...

Episode 23 Puzzle Square Puzzle-master Thirty-six challenges the others to find a way into Puzzle Square by opening locks with Numberblocks.

While you're watching the show, keep up a running commentary - ask your child what they can see, what just happened or what they think will happen next. You might be surprised how quickly you're ...