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URL: http://tux4kids.alioth.debian.org/tuxmath/download.phpThis is an action game to each children math. It is recommended for children starting with those in the 1st grade. One gameplay option has flaming asteroids falling to destroy the penguin population unless the child can solve the math problem for each asteroid. Solving the problem allows the asteroid to be zapped by a laser beam. Tuxmath is part of Debian [http://tux4kids.alioth.debian.org/ Tux for Kids].