Shrinky Dinks.
Easy Bake Ovens.
Creepy Crawlers.
These were the among the worst in terms of danger. You got little aluminum molds of bugs and other such things (and the "Girl's Set" had flowers) and squeeze bottles of "Plastigoop". Fill the molds with the colors of your choice, or mix them if you're feeling daring, and put them in an open-top very hot oven thingy. Time it closely. Too short and they came out gooey. Too long and they'd burn. They put out a god-awful smell while cooking, and I can't imagine how many kids got 3rd degree burns. After they cooled you picked the things out of the mold and put the rubber cockroaches, etc. in your sibling's sandwich.
- Stephanie