Numberjacks - Series 1 - 4 and a Bit

Preschool adventure series in which animated numbers solve mathematical problems with children. Numbers 4 and 5 make a little man by matching shapes in the cosy room. Number 4 has to head out on a mission to find out why things with matching sides suddenly aren't matching any more. It's the Shape Japer causing the trouble. Luckily 7 is on hand to help and everyone ends up with the right mix of matching and not matching sides.