1995 - Cheerios Biker Mice from Mars Stakkers Free in Packets

Set of 4 cards, folded in 3, with 2 disc Stakkers on each (6 in total per card). Reverse of disc says Honey Nut Cheerios.  Also limited number 250k  of Stakker Attackers, a plastic disc also branded Honey Nut Cheerios.  Also issued in Shreddies & Golden Grahams