This design is intended as a D&T project for individuals at secondary schools, or after school clubs.


It uses the same simple bent wire-in-a-slot technique that flaps the tail of the robotic fish ‘Windowbream’.

In this case however the motion creates a humped walking action caterpillar from junk-box materials.


The body sections are cut from expanded polystyrene and then stuck to cloth tape.


The top and bottom halves are then joined using self adhesive spongy foam, leaving a slot between them in which the bent wire rests (from a ring main cable)


This wire in the slot technique can be used for all sorts of animal-like motions and hopefully the students will come up with their own designs of fish, snakes, hands, and other ‘Wriggling Wrobots’