$4.99, iPad, iPhone, Kindle, Android

6-up

Teaches: patterns, pattern awareness, timing, fine motor skills, temporal relations, loops

$3.99, iPad, Android, Kindle

6-up

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

$1.99, iPad, iPhone, Android, Kindle

2-4

Teaches: language, English, French, German, Spanish and Chinese

$1.99, iPad, Kindle, Android

3-6

Teaches: math, counting, addition; language

$2.99, Android, iPad, iPhone, Kindle

6-15

Teaches: problem solving, math, fractions, logic