Introducing MindGames, a series of conceptual puzzle and activity books for kids eight and up-and we mean up-who enjoy the challenge of solving problems and the pleasure of figuring out new ways of seeing things. Created by Ivan Moscovich, a world-renowned inventor of games, puzzles, and toys, each book comes with a three-dimensional, interactive puzzle on the cover, and dozens of full-color illustrated problems on the same theme inside.

Beginning with Elevation on the cover-an ingenious progressive game involving moving the disks level by level to the top, Number Games covers geometry, symmetry, fractal points, and lines. There are magic squares, magic hexagons, magic triangles. Plus Pixel Craft. Think of a Number. The Spider Web Puzzle and Cut the Cake.

The most important skills needed to solve these puzzles are curiosity and an open mind. (Solutions and explanations are provided, of course!)

Also in the MindGames series: Probability Games, Network Games, Pattern Games.