24. Pink Panther Flakes Spy Kit
Year of Giveaway: Early 1970s
Est. Value Today: $200*
In the early 1970s, Pink Panther Flakes were created as a way to promote the Pink Panther cartoon. Like Cornflakes but in a pale pink color, the cereal even dyed the milk pink too. To incentivize purchasing the cereal, it included a 5-in-1 spy kit.
Pink Panther Flakes Spy Kit @mytoys1221 / Pinterest.com
With a magnifying glass and other gadgets to help kids spy on the go, the toy was a real hit. The plastic toy apparently broke easily, but if you happen to have one unused and still in its packaging, you could be looking at a cool $200 for your restraint.