In households across the country, in a junk drawer somewhere, you can probably find a miniature magnifying glass made of plastic. Given away as premiums or sold in gumball machine, these magnifiers were ubiquitous in the mid-20th century. Cracker Jack had their own versions of these functional toys. Though easily scratched, they actually worked.
Plastic prizes became a fixture in the Cracker Jack catalog starting in the 1950 when plastic became king. Among the range of plastic prizes are clear and see-through objects including fishbowl, lanterns and the funny viewers shown below.