I had my share of sleepovers as a kid, both attending and hosting. But back in the '90s, we were relegated to 8 or 16-bit video games, board games, jokes, stories, books, and physical games like sardines (similar to hide and seek, but 10 times more fun).
Sardines is a derivative of hide-and-seek, where only one person hides and the others must find him/her. When somebody finds the hiding person, they stay and hide with them. The more people find that person, the more cramped the hiding space becomes (like sardines in a tin, hence the name). The first person to find the hiding group gets to hide next. The last person to find them is the loser.
Today, kids are so attached to their mobile devices, smartphones, and tablets, I don't think they even know how to have proper fun anymore. Nevertheless, children's slumber parties are often a highlight of their childhood, as they were for mine. But as I've gotten older, I've learned the hard way that as time passes you by, the only sleepovers you have are the result of something accidental like passing out after being too drunk to drive, being kicked out of the house, or meeting a girl in a bar. The latter is, of course, the best kind.