One of the best math games for kids websites is the math section of BrainPOP and it's today's Cool Site of the Day. Founded in 1999, BrainPOP creates animated, curricular content that engages students, supports educators, and bolsters achievement. Their award-winning online educational resources include BrainPOP Jr. (K-3), BrainPOP, BrainPOP Español, and, for English language learners, BrainPOP ESL. In traditional, blended, and "flipped" learning settings, BrainPOP supports individual, team, and whole-class learning. At school and in informal learning environments, their characters help introduce new topics and illustrate complex concepts. Vote for it here and give it a thumbs up above.