My parents got me an Atari 2600 back when I was maybe 5, around 1980-81. Our library wasn’t big, but I can tell you the games I remember having the most fun with:
Combat
Space Invaders
Space War
Air-Sea Battle
Asteroids
Warlords
Moon Patrol
Missile Command
Frankenstein’s Monster
I also recall having fun with the game Picnic, but after watching a video on it, I wonder if that’s the rose-colored glasses of youth clouding my judgement...