$3.99, iPad, iPhone, Android

2-5

Teaches: starter app, creativity, language, logic

$4.99, iPad, Android, Steam

9-up

Teaches: logic, human development, art, spatial problem solving

$4.99, iPad, iPhone

6-up

Teaches: logic, math, spatial relations, art, mechanics, optical illusions

$2.99, iPad, iPhone

2-5

Teaches: colors, spatial relations (front and behind), art

$2.99, iPad, iPhone, Android

3-12

Teaches: creativity, using the camera, cartoons

$2.99, iPad, Android, iPhone, Apple TV

4-10

Teaches: creativity, logic, spatial relations, art, blocks

$0.99, iPad, iPhone, iPod Touch (iOS 6.0 or later)

0-3

Teaches: symmetry, art, creativity

$2.99, iPad, Android, iPhone

5-9

Teaches: science, creativity, logic, spatial relations, ecology, ecosystems, earth science

$0.99, iPad (37MB)

1-7

Teaches: art, creativity, music, temporal relations

$3.99, iPad, Android, Kindle

6-up

Teaches: logic, math, spatial relations, art, mechanics, optical illusions, simplified Chinese, Traditional Chinese