Once the holidays have come and gone, the last remembrance of the holiday may be all of those holiday cards that you received. It can seem easy to toss them into the recycling bin or stash them away in a drawer. However, upcycling holiday cards into something new and fun is always a good idea. One of the best ways that I have found to upcycle holiday cards is by using them to make jigsaw puzzle thank you cards to send to friends and family. Your child's friends, cousins and other recipients will love receiving a thank you card puzzle. This super-simple craft will keep your children entertained for an afternoon during winter break, read on to learn how.