Parents' annoyance level: 4/10. Skip-It made kids exercise and get outside, but it also ended in a lot of trips to the hospital.

Here's the thing about Skip-It: You tie this rolling ball attached to a string to your leg that encourages you to move faster and faster. Fun, right? Here's the catch, the rolling ball only works on hard surfaces, like concrete, and definitely not grass. So, you have something whose main purpose is to trip you and break your skull. It. Was. Awesome.