One of the best sleepover party ideas is to let the girls camp overnight in your garden!
Depending on how boisterous the girls are, you can organize hide and seek games, lost and found games, water balloon games, etc. It’s also a great chance to have the girls get involved in cooking some healthy and brightly colored foods (like peppers, crazily-topped pizzas and exotic fruits).
Some ghost stories can be exchanged in the tent before bedtime (obviously age-dependant ones!), and the girls can either stay in the tent(s) or watch a dvd voted on by them all inside. Great memorable fun!

