Let's dream up a toy for children, shall we? Let's start with plastic goop the consistency of syrup and add an electric-powered mold that heats to 300 degrees Fahrenheit (149 degrees Celsius).
This may seem like a dangerous mix, but these were the primary ingredients in Creepy Crawlers, a toy sold in 1964. The idea was to let kids mold their own spiders and bugs out of plastic, all the while breathing potentially toxic and deadly fumes. Oh, and burning their fingers on the sizzling hot plate, too [source: Retroland].