HELP!! I lost 2 IPod touch last night!! Please help me recover them ASAP!!!!

PLEASE HELP ME!!!! I lost 2 IPod touches last night. My sister's IPod was in a pink wallet, but it got lost in preparation for her school performance. My IPod was in my backpack but it got lost also!! I starting to think that someone stole it, but I have no idea who or why. Please help me. My parents are going to be so mad at us for a long time if I can't recover it. TO ANYONE LIVING IN THE PHILIPPINES, PLEASE REPORT THIS LOSS TO THE PROPER AUTHORITIES!! Also, please suggest anything I can do to help find my STOLEN IPods. Thank you in advance!!