Free Online Cool Math Games. Practice your math skills the fun way.MathPup has cool math games and fun games to play for your PC, tablet or mobile phone. No membership or sign-up required. Find math games to play by subject or grade level. There are games for kindergarten all the way up to 8th grade and subjects start at counting and go all the way up to algebra. Practice math the fun way with our cool HTML 5 math games. And keep coming back as we are always adding more cool math games and fun games.