Create multi-coloured number bugs which slot together easily. Body segments have numbers on one side and are blank on the reverse to enable the teacher to hide a number for the child to identify. Heads measure: 5cm (to top of antennae) x 4cm wide. Size of body segment 3.5cm x 3.5cm. Includes 4 caterpillar bug heads, 20 body segments 1-20. Ages 3+.