So very sorry this happened to you! Was your grandson able to find anything? I'm glad you were not hurt in the incident and you did right by contacting the police and the store. The store is the only place she can quickly exchange it for cash if she has the receipt, and you warned them to be on the lookout for that material returning. You did good. Sounds like my life, try to do something good for someone and get kicked in the head for your effort!