A sleepover is when you stay at someone else's house for the night and sleep there.
Sleepovers are usually fun and exciting for kids because they get to spend time with their friends.
Examples:
I had a sleepover at my friend's house last weekend.
Do you want to have a sleepover at my house?
We had a big sleepover with all my friends.
The sleepover was so fun, we stayed up late telling stories.
I wish every night could be a sleepover, it's so much fun!
The sleepover was the best night ever, we played games and ate snacks.