Numberblocks is a British animated series for preschool children that premiered on CBeebies in 2017, created to teach early maths through characters made of stacking blocks. Each Numberblock is the number it represents, and Eleven is formed from a column of ten with one extra, reflecting his place just beyond ten. The show became a staple of classroom and home learning through BBC broadcasts, streaming and official YouTube uploads, where short character clips are widely reused by teachers, parents and young fans in counting sequences and fan-made number videos online.