A great birthday party idea for preteen girls is a Mall Madness birthday party. A Mall Madness birthday party is basically a scavenger hunt in the mall. For example, you could all meet at your house. Once everyone arrives, you could head to the mall. At the mall, everyone would split into groups and get things (a picture with the cashier or ask the cashier for a rubber band, etc.) Once a group gets everything on the list, they get a prize (gift card, toys, cash, beauty products, etc.) After that, pizza is a great way to end the day before everyone either goes home or spends the night!
