Styling games are among the safer categories to hand to a younger player, but the differences between individual titles matter more than the category does. Four things are worth checking before you do.
First, whether anything is locked. A game where half the wardrobe is greyed out teaches a child to hunt for a purchase button, and a surprising number of otherwise gentle titles are built that way. The ones worth keeping say plainly that nothing is locked, and mean it.
Second, whether there is an account. Nothing in this genre needs one, and a game that asks for a sign-in before it will start is asking for something it does not require.
Third, mechanical complexity. Colouring games and simple wardrobe swaps work for very young players. Sewing sequences, layered salon tools and games with a scored contest need more patience and are better for slightly older ones — not because they are difficult, but because failing to finish is frustrating.
Fourth, whether the game ends. Titles with a clear finish — a photo, a show, a completed picture — are much easier to stop playing than open wardrobes with no natural end point, and that difference is worth more at bedtime than any content rating.