According to a study by Common Sense Media, 51 percent of Americans aged eight and under have played a video game on a console. The first gaming experience tends to be under the age of four these days, given the ease of access to games on things like mobile devices.

The study also found that 44 percent had played a game in the two to four age bracket and over 81 percent of the respondents in the five-to-eight age bracket had also played. In retention, 36 percent of kids aged five to eight are continuing to play games at least once a week; 17 percent play once per day.

Source: Common Sense Media {link no longer active}