If your girls have been bitten by the Rainbow Loom bug, here is a great deal from Amazon.

Silicone  Bands for Rainbow Loom – 1800pcs Mixed Colors with 85+ C_clips and S_clips Mix – Just $10.95 shipped!! That’s $3.50 per 600. 

(If the price changes, look at the “More Buying Choices” on the right side and shop for a better deal)

Colorful Silicone LOOM BANDS – 600 Bands & 25 “S” Clips! Not as good a deal but better if you don’t need as many. $3.99