Riding a roller coaster can feel very scary, whether you’re in Australia, Germany, Japan, or on any of almost 1900 roller coasters in the world. That butterfly feeling isn’t for everyone, so some people stand on the ground and wave. Which would you and your friends rather do? Here’s one cool way to remember (or imagine) the fun! Try it on a rainy or wintry day with a friend. Create several different roller coasters.