Welcome to Gravity Park!
I am Rollo the marble. I roll down every ride before it opens. The park needs new coaster designers, and that means you! Try each ride, learn its science secret, and unlock pieces to build your own coaster.
Save codes
Using a different Chromebook, or did your progress disappear? Type your newest save code here and press the button to get it all back.
My park pass
My badges
Each ride you finish turns one badge gold.
Five things in the banner do something when you click them. Can you find them all?
My science words
My progress report
Chief's Exam
My certificate
You finished every ride in Gravity Park! Type your name and make your Chief Thrill Engineer certificate.
To put it in a Google Doc: press Copy the picture, click in your Doc, and press Ctrl and V together.
Open now Locked Finished
Build Lab
Build your own paper coaster and test it with a marble. When the marble rolls over a piece, Rollo tells you the science behind it.
My coaster pieces
Park TV
Every ride you finish adds a review tape to the shelf. Press a tape to play it. You can watch your tapes as many times as you like.
Card Vault
Park Gazette
Extra! Extra! Be a reporter for the park newspaper. Read each story, hunt for the science words hiding inside it, and fill up your Reporter's Notebook.
The stories
Teacher note
Enter the teacher code to unlock everything that is built so far, so you can see it without playing through.
Save codes: students get a new 9 character save code after each ride, Build Lab stamp, Gazette story and exam. Their newest code holds all of their progress. On a different Chromebook they type it in the Save codes box on this Home tab. A code only adds progress, it never erases any.
Page version: October 23, 2026 (train secret fix)