One player thinks of a category such as things that fly.
This category must not be revealed to the other children.
The player then names something that fits in that category, for example a wasp, and then the other children have to try and guess what the category is.
If no correct guesses are made then the player names something else that also fits into the category, for example an airplane.
Play continues until someone guesses what the category is.
The child who guesses the category correctly gets to start the game by picking the next category and naming an item that falls into that category.
This game can be quite difficult for young children so you might want to divide the children into teams.