Collection

The Irrationals: A Story of the Numbers You Can't Count On

Paperback | 32 pages

Falling marble logic game

The Beauty of Numbers in Nature

Hardcover | 320 pages

Hardcover | 256 pages

More Mathematical Puzzles of Sam Loyd; Martin Gardner

Backgammon is one of the oldest games in the world, the origins of which date back some 5000 years – and it's still going strong!

Crocheting Adventures with Hyperbolic Planes, Second Edition (Hardcover)

From the author of the award-winning Which One Doesn’t Belong? and How Many? comes How Did You Count?, the latest title in Christopher Danielson’s collection that is sure to spark conversation, questioning and wondering amongst both younger and older stud

Binomial Squares Puzzle

ITSPHUN Mini Puzzles, Single (#2, 3, 4, 5, 6, 7, 8, 9, 10)