A living physics sandbox where you invent the matter and the rules.
Sand Pit Online is a falling-sand simulator with a twist: you define the physics. Create substances, make them interact, and watch the chemistry evolve. Build entire systems within Pits, then share them for others to see!
No account needed to start pouring.
Design
Invent "substances" with physical properties to determine how sand flows. Then, author interactions that turn them into something new.
Simulate
Pour your substances into a live physics engine and watch them follow your rules. Create countless dynamic systems.
Snapshot
Pause and save a whole board, including all of its custom substances, into a shareable "Pit" that others can replay.
Explore!
Grab a free account to publish both your substances and your Pits. Then browse, download, remix, and vote on everyone else's.