DIY Dollar Tree Christmas Decor. Rustic DIY Christmas sign decor made from Dollar Tree supplies that would be great for indor or out door Christmas decorating. I love Christmas Diys the most and I am so excited to share this easy and inexpensive Christmas DIY with you! The whole project was very inexpensive and only cost last than $10! I have seen similar Christmas signs sell for well over $40 so I’m excited this DIY was so cheap.