A&A Pocket Puzzle discontinued Each sleek top is turned

Each sleek top is turned from a single piece of specially selected

Serpentine

the book simplifies and explains all the key breakthroughs

fossils of which date back 270 million years

and death of stars is key to a knowledge of astronomy

A&A Pocket Puzzle discontinued Each sleek top is turnedThis metal take apart puzzle is so much fun to play with, you'll want to solve it again and again. Two lower case "a" shapes are hooked together. One is golden and one is silver but other than that, they appear to be more or less identical. Fiddle with the pieces to reveal an extremely satisfying sequence of flipping and slipping movements that allow the two a's to rotate around, inside and through each other. The solution is simple but exciting and