Football stickers and albums...I have the name "Figurini Panini" in my head for them, but I'm not sure about that. They were essentially a pre-internet form of loot box - you paid money for a pack in the hope of getting a rare one.
Jawbreakers. Big hard sweets, basically.
Dinosour (sic) eggs, which were the same sort of thing as jawbreakers but which tasted bad. Deliberately - they were very sour, hence the name.
Mixing various fizzy pop. Which always came out brown and tasted crap, but we did it anyway because reasons.
Slush puppies. Crushed ice with brightly coloured flavoured liquid. Probably with a bazillion additives that might or might not have been harmful.
Ice pops. Tubes of soft drink that were intended to be frozen. Often blue flavoured. Is blue a flavour? It is with enough additives!
Things attached to the spokes of wheels on bicycles to make them sound like an engine. They didn't really, unsurprisingly. They were like fake "turbo whistles" for chavvy cars, only older and worse. I disdained them for being fake.
Knives. No, seriously. When I was a boy, most boys carried knives. Usually folding and locking knives that I'm pretty sure would be illegal nowadays. Bonus points for size and bonus points if it was a multitool (always called "Swiss army knife", regardless of the origin) and had half a dozen things you'd never use on it. Because a city boy in England in the 1970s really needed a tool for removing stones from a horse's hoof. Not that he'd ever even seen a horse, but reasons.
Bicycles. Plus, of course, stupidly dangerous things done on bicycles. How many people can you jump over without landing on any of them? Let's find out! Can you wheelie all the way down the high street, weaving through traffic? One local boy did, which made him a hero. I still remember his name. If you dig up enough dirt, can you build a ramp that will make it possible for you to jump this river on a bike? I tried. I failed. Somehow, I neither badly injured myself nor drowned. I couldn't swim, but hey, how was that of any relevance to jumping a river on a bike? I was as dumb as a bag of rocks. One of the reasons I'm glad I don't have children is that I would go mad worrying they were as dumb as I was at their age.