I have been on quit a tight budget but that wont stop me from my newest and most exciting adventure of penny searching and collecting.I have looked at multiple sites and their prices are too high for my zero content wallet at the moment. But its quite frustrating to have to sort out the same pennies over and over after mixing them back into a big when my almost 2 year old wants to do her own sorting with my precious collection on over $30 in pennies. Im not sure what materials are safe for protecting my pennies except that pvc is bad. My bf/fiance brought home some baseball card binder protectors but to scared it will mess up my pennies cuz they are unprotected and sleeveless,lol. I have foem of different thickness and hardness and also different types of rubber like convayer belts are made from. so homemade i can do but need info on design ant material use. Thx for reading hope it wasn't too boring,lol. pennies,pennies,pennies, from my head down to my knees. new addiction.