Stackable

2pc Pyramid - Classic Brain Teaser (discon-11080)

$7.95
Pomegranate, 16pc

Design Blocks: 16 Color Cubes - 16pc Block by Pomegranate ^NEW

$24.95
Tower of Babel - Stackable Puzzle

$17.95
Obelisk - Wood Stackable Puzzle

$17.95
Pomegranate, 12pc

Charley Harper: Tree of Life - 12pc Block Puzzle by Pomegranate

$22.95
Triangulator

$11.95
Pomegranate, 12pc

William Morris - 12pc Block Puzzle by Pomegranate

$22.95
Happy Cube – Little Genius– six pack

$30.95

Stackable puzzles don't require anything but gravity once they're together. But you have to figure out how to get them together, first.