Sorry to hear about your mother. I have a similar story. Three happy kids, I being one of them, got to share a new 2600 on a Chiristmas 1980's too. I tried to sell it about 20 years ago. My Dad drove 60 miles, half distance from where I live, to buy it back from me. I got it back when he passed four year ago. I still call it "Dad's Atari" to honor that memory. I consider it a family heirloom now. It's a four switch woody 2600 with a recent AV mod from electronicsentimentalities.com.
1.) Lunar Lander: with the two button rotate
and large throttle control. First time played at
the Huntsville Space and Rocket Center. It was
close to 35 yrs ago. The place was busy and I had to
wait in a line for a chance at "one turn" free play with
the other kids. I nailed a perfect first landing and enjoyed
the cheer from the kids waiting behind me. It's my favorite game period.
2.). The Last Starfighter: favorite movie. Cool game intro.
3.). Vindicators: Favorite two player game. I played
this game with my twin until my hands just about went
lymph from fatigue.