The picture below shows larger views of the two images of this Colorful 1960 Cereal Prize Sherman & Peabody Cartoon Character Lenticular or Flicker Square. The flicker square is not dated but it is from 1960 when it was used as a prize in a General Mills WheatHearts cereal box. It was made by Vari-Vue. It is marked on the front with their names as follows:
PEABODY SHERMAN
The colorful square measures about 1-1/8'' x 1-1/4''. It appears to be in mint condition as pictured.