John Lewis 'Build Your Own Spiral Drawing Kit'. Kit has been built by my son who has now grown out of this but it still works. Up to 64 different drawing patterns are possible. There's a short video on the John Lewis website showing this in action.
Original kit was recommended age 8+ but it would probably be fine for younger children (?6+) to use now its built
Battery-driven 'spirograph' toy (Shrivenham SN6)
This offer has been gifted to someone and is no longer available.