For married dependents who are under the age of 65 and not blind, you generally must file a federal income tax return if your unearned income was more than $950; if your earned income was over $5,950; or if your gross income was at least $5 and your spouse files a separate return and itemizes deductions.
The Atari 2600 came out in 1977. Originally known as the VCS or  Video Computer System, it was renamed to it's catalog number  (CX-2600) in 1982.
The first home video games didn't appear until the early 1970s and didn't become widely popular until 1975. That was when Atari adapted its PONG game from the electronic arcade version, and video game mania swept the country. That was just the beginning, of course.