Shopping and then out for dinner
Bowling
Laser Tag
Paintball
Go Karting
Spa Day
Cinema
Go Ape (outdoor thing)
Sleepover with movies, painting nails and wearing face masks
You could bake her a homemade birthday cake and get in plenty of snacks and food
Set up a paint class for everyone celebrating her bday. Its fun and you should be able to bring party items like cake foods drinks decorations.
