Stampolines is the Eleventh episode of the first season of Numberblocks.
The episode begins with One and Two, Two shows One the shapes he can make, then he repeats. Two says it's One's turn to make an arrangement, she trys, then she fails. One and Two hear a sound. They follow the yellow block-printed arrows. They see what they think is Four, Two tests if the Four is real by playing musical statues with it, One sees it is a painting of him. but it's only a drawing. They enter the new stampoline park. Three welcomes One and Two to her new stampoline park, Two thinks it's a trampoline park, Three wrongs him . Three encourages them to look at how Four does his shapes, he thinks it was fun. Two questions if it's Four, Four says he is of course. he says whatever way round he goes, he is still Four. Three does the same as he does by stamping an arrow shape on the canvas. Four encourages them to see how five does her shapes. One questions if she did all of her shapes, she answers that she did so, she says the more blocks you have, the more shapes you can make. it is now Two's turn, he makes 2 shapes with 1 going up, and one going down. Three reacts to Two's art, saying it's not bad. One says that Two's art is stiill better than her's, she shows them the only shape she could make, just one block, she says that it's very exciting compared to the others. Three tells her she's forgetting something. She yells "BOO!", causing Four to split into four Ones.
Three says every big shape is made up of lots of little ones.
One sees a blank paper and stamps one block print, two one block prints, three one block prints, four one block prints, and five one block prints. Three draws the Numberblocks' faces and numbers on the prints.
To celebrate the grand opening of the park, the Numberblocks stamp themselves on a black screen. They've stamped a portrait of all five Numberblocks.
- The song "1812 Overture" plays in the grand finale.
- A farting noise is heard when One hits the paper on her stampoline.
- In Four's vertical form, his face is different than it usually is, being located on 2 of his blocks instead of his top block.
- When Three says "BOO!", Four's legs become detached from his body.
- The painting has white when there is no white pads
- There is several errors on the big panting.
- Two's lips are red.
- Two's glasses are pink.
- Two's shoes are yellow.
- Two's arms are invisible.
- Five's lips are purple.
- Three's crown on the detail has a bit of red.