if they send you a kit - no you can not claim it on your taxes-
you can (as long as you save all receipts) deduct the cost of materials. you can not claim the market value of the item- or your time- that is considered-you volunteering your time- only actual cost of materials- and if you get audited you need your reciepts. it is a good idea to keep a good list of what you use and take pics of the items to go with your list- and receipts.