Things that don't cost money.
Coffee Cans - The metal kind w/lids
Ice Cream Buckets - The big plastic ones
Used Books that are appropriate for school
Used Magazines that are appropriate for school
Clear Two Liter Plastic Bottles
Shoeboxes with lids
Altoids Tins
Things that do cost money.
Kleenex
Ziploc Bags
Any Type of Paper