Could be from childhood or last week. As much stuff as you want. Mine, in no particular order:
--My maternal grandparents
Me too. Because mine were immigrants they were always a little 'different' to my friend's All-American grandparents.
--Christmas before I knew there was no Santa
--Conducting "experiments" such as: putting batteries into cardboard tubes and smashing them with a sledgehammer, putting a D-cell battery into a lamp socket, making gunpowder and other homemade explosives with my grandpa
Oh, yes! My big bro & I used to get up to all kinds of stuff like blowing up eggs in the microwave or setting fires at the school playground! Although it was usually my bro & his friends who was up to these antics, I just looked on innocently or covered for them when they got caught out.
--When staying up late for Saturday Night Live was a thrill
--When Saturday Night Live didn't totally suck
--The futuristic angst of early to mid 1980s Cold War culture that created such things as Red Dawn, Blade Runner, Sigue-Sigue Sputnik and a lot of other great movies and music.
That was a very interesting and, IMO very f**ked up time to be a kid but Red Dawn is definitely classic!
--Backpacking/camping
Growing up in Oregon I used to go on camping trips all the time with my family and I became a pretty decent fisher for a goofy kid who didn't have an athletic gene in her.
Camping and a decent knowledge of woodworking & cabinetry are a couple of the things I have to thank my step-dad for although we are not on speaking terms at present.
Oh! A few more things!
The original Nintendo.
The first Game Boy
Video arcades
Great after-school shows like You Can't Do That on Television, Mr Wizard, Mr Belvedere and all the cartoons which were really mindless plugs for new toys we were supposed to convince our parents we couldn't live without like Transformers, Masters of the Universe, etc...