Beanie Babies - somehow better than other stuffed animals. $3-6 Billion in profit to date.

Doggles - Millions of units sold for whatever reason.

Slap bracelets - if you grew up in the 90's you were slapping these on all the time. $6-8 million in 1990 alone.

Furby - creepy, furry animal-robot thing sold 40 million units in the first three years.

Billy Bob Teeth - for some reason these have made $40 million in sales.

The Pet Rock - tricking people into buying a rock they could pick up outside made an estimated $15 million in the first six months. That would be like $56 million today. IN THE FIRST SIX MONTHS. FOR A ROCK!

Yellow Smiley Faces - bet you didn't even know this was a thing. The owner of the yellow smiley face made $50 million in the first year and a half.

Hula Hoops - pretty simple product, who would've thought it would be so much fun? They were making 50,000 of these a day.

The Koosh Ball - whatever this is sold 50 million units.

The Magic 8 Ball - I guess the 8 ball makes asking questions to a 20-sided die cool. Apparently a million of these are still selling annually.

The Pillow Pet - A stuffed animal shaped kind of like a pillow. $300 million in sales in 2010.

Silly Putty - Pretty fun when you were little, but essentially it's a rubbery playdoh that copies the newspaper. 250,000 units sold in the first three days. Around six million sold in the first year.

The Snuggie - Nothing to say here. $200 million in profit.

Tamagotchi - Oh man, you were cool if you had one of these, or six or seven. More than 70 million sold, grossing about $900 million.

The Slinky - actually pretty cool, but this simple toy made a cool $250 million.

Big Mouth Billy Bass - Chances are you have an uncle with one of these still up in the basement. Over a million sold in 2000 alone.