Golden Barrel Cactus

Tackle this prickly jigsaw of a Golden Barrel Cactus (Echinocactus grusonii ) native to central Mexico.

Photograph © John M Pattenden

Controls: Click down on a piece to move it and release your mouse button to place it. A piece placed next to a connecting piece snaps the two together. The timer begins once you hit the start button and stops when you have completed the jigsaw puzzle. There are advanced options in the menu to the left.