THCommandBlocks's experience level: 17

Just spawn it in! One of the buttons creates the roller coaster, while the other sends you on a ride.

Polar bears in one command block! To get a polar bear spawn egg, name a sheep spawn egg Polar_bear in an anvil. Polar bears drop polar bear rugs

This command adds sharks crabs and turtles to your game. To spawn in a shark name a squid spawn egg Shark. For the crab and turtle name a pig spawn egg Crab and Turtle.

Bees will sting you and attack you. You can spawn them in by naming a bat spawn egg, Bee.

Bears attack you, and drop meat! Bear meat fills 2 hunger bars. Best used at night.