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14 Apps That Will Help Your Kids Learn This Summer (and Give You a Much-Needed Break)
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Threes!

Threes! ($6) is a fun math-based puzzle game that lets kids practice their addition. The easy-to-learn, tough-to-master game, recommended for kids ages 8 and up, encourages math skills and strategic planning by having players merge numbers to create bigger numbers and repeat to avoid gridlock.

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