My mom bought me a souvenir sweatshirt from the Christmas Mouse when I was like nine or 10 years old. Somehow, the thing still fits. I must've been swimming in it back then, but it was one of my prized clothing possessions (as evidenced by the fact that I still have it). Point being: This place holds a special place in my childhood memories. I'd visit Williamsburg on family vacas growing up, and CM was always a must-visit shop.
CM is a rather large Christmas shop. It has two full floors, and it's packed with all sorts of decor, but mostly ornaments. They have a HUGE gingerbread section, as well as a ton of nutcrackers, sports themed items, little food and drink ornaments (love 'em), and plenty more. Heck, they even have a Coca Cola tree!
The folks who work here are so friendly and kind. As I was checking out, the lady noted a small paint chip on one of the bird ornaments that I didn't see, so she suggested I swap it out. Plus I asked if I could take photos of some items to send to my mom, and they were totally okay with it.
It's important to note that items are extremely affordable. It's the perfect place to visit for Christmas goods, even in July. Especially in July.