Animated numbers solve real world mathematical problems, with help from real children. In the Cosy Room, 0 and 1 are failing to help 3 sort her beautiful things. A girl's toys are being jumped into groups of animals and trucks. In the park, picnickers are in groups by age, or by the colour of their tops. Then they are grouped by the things they are playing with - curvy things or straight things! Spooky is responsible. The Numberjacks send Brain Gain but 4 has been jumped away by Spooky Spoon because he isn't a big thing. 4 comes back and manages to sort Spooky. The Brain Gain gets through and all is sorted.