These buttons were made for JHB International in 1998.
They are painted wood realistic images of “Snap”, “Crackle” and “Pop” who were pictured on Kellogg’s Rice Bubbles cereal packets. You could hear the bubbles snap, crackle and pop when you poured on the milk. It was a good advertising theme. They have a backmark TM and a clear plastic shank glued on.