I was really lucky that I decided on Zara's party theme early on, as i was able to get some great party favours at awesome prices! Here are some great places to look out for fun stuff:
Owl Toothbrush Holders
Owl Pencil and Erasers
Pink and White Striped Sambellina Gift bags
Pink Thank You Gift Tags
Owl Tshirts and Pale Pink Tights, I picked these up on sale for next to nothing and then all the girls dressed up in matching PJs.
Owl Little Pencil Pouches (I used these to hold the PJs)