Welcome to the Build Lab! Build a paper coaster that carries the marble from the Start all the way down into the Finish cup. Every piece has a science secret. Drop the marble, and I will tell you what happened at each piece.
- 1Drag a piece onto the grid, or click a piece and then click a spot
- 2Tap a piece on the grid to flip it or remove it
- 3Press Drop the marble
Pieces
About this piece
Rollo's test report
- Drop the marble and this report fills in, one piece at a time.
Builder missions
My design sheet
Ready to build your coaster for real? Make a design sheet of the coaster on your grid. It has a picture, a parts list, and questions to answer after your real marble test. You can paste it into a Google Doc or print it.
To use it in Google Docs: press Copy the whole sheet, open a Google Doc, click on the page, and press Ctrl and V together.
Teacher note
Pieces unlock as students finish rides. Their coaster and mission stamps are saved on this computer. Enter the teacher code to unlock every piece, or to reset this page.
Page version: October 20, 2026 (save codes)