Handheld games
One of my favourite things as a child was to play the handheld games I had which wasn't many. Mortal Kombat I remember playing and loving, not wanting to put it down at all. I think they were a lot more popular before the Gameboy came out which ended up changing handheld gaming, that's for sure!
I was lucky enough to try out a few others due to my friends having one as well, some of them did anyway. Among them were Power Rangers, The Lion King, and Double Dragon all of which were a lot of fun, making you feel like you were super awesome and a part of the movie/tv show while playing.
One other which my family had but I played the most was a handheld Tetris game called Brick Game and involved a variety of levels and speeds etc to change up the gameplay.
If I could find these somewhere and I had spare cash, I reckon I would have to grab them as they were just the best back in the day and I would be super happy getting to play them again, even for one day... (Though having them taken away from me would make me mad) Stomps his feet.