Comedy adventure series, aimed at four- and five-year-olds, in which animated numbers solve mathematical problems in the real world, with input from children. The Numberjacks are called on to sort out the Problem Blob. A boy's car will only go forward and he wants it to go backwards. A man in the park has slime on his shoe and can't walk back to get his briefcase - he can only walk forwards. The Numberjacks use the Brain Gain to put things right and sort the Problem Blob out.