This website is amazing for kids. I am a father of 2 and they love this website. I checked the reviews and I just wanna say that they are not lying about anything, but its not the sites issue. The reason that people are getting viruses is the ads. Those people pay coolmath to show there advertisement. The advertisement is the one with the virus. Just do not click on any ads and stay on the website then you should be fine!
How I Use It
I use it to help my 2 kids instantly know answers to subtraction. They both love sports so there is a game I found called Penalty Kick. You can pick a team and you have to kick the ball into the goal then next round you make sure the ball doesnt go in the goal. If you get the ball in the goal the first time, then you have to do a math equation. Its simple and fun and the kids love it.