Interlocking
How a Burr Key Piece Works
See how one constrained bar can hold an entire interlocking structure together.
Open sectionInside the puzzle
How Puzzle Mechanisms Work
Animated explainers show how key pieces, sliding panels and disentanglement moves create apparently impossible challenges.
Choose an activity
Explore how puzzle mechanisms work
Opening puzzle
How a Sliding-Panel Box Works
Follow a simplified sequence in which panels expose a pin and free a drawer.
Open sectionDisentanglement
How Ring-and-Loop Puzzles Work
Understand why changing the route of a loop can release a ring without bending or opening it.
Open sectionThe animations show generic principles and do not reproduce a commercial mechanism or complete solution.