Most families have some clothes they never wear at the back of the cupboard. It might be an old coat, a hat, or a jumper.
Children love dressing up and trying things on. Especially things that don’t fit well (a huge hat can keep them laughing all morning), or that help them imagine.
You don’t need to buy expensive costumes. A blanket can become a cloak, a knotted scarf a pirate’s hat
There is a lot of learning going on. Children try out different roles, different versions of themselves. Being brave as a soldier, or caring as a nurse.
And there is lots you can do to deepen the learning just by talking about what you see, and adding vocabulary. “What a scary ghost!”