I bet that GreevilGoods sells a lot of their Frozen-themed blankets! I know my four-year-old would love one. The blankets come in different sizes: small (40" by 50"), medium (50" by 60"), and large (58" by 80"). They are made with anti-pilling polar fleece fabric and are machine washable. They have a full color printing process, too.
Many of the designs are based on vivid photos of artists, featuring everyone from Marilyn Manson to Bruno Mars. Others are more animation/drawing based designs. There really is something for everyone. Many of the designs are meant to appeal to adults, including a design with a marijuana leaf.
In addition to the blankets, GreevilGoods features other products such as messenger bags and backpacks. These also have full color printing and a lot of different designs. Some examples of designs include Adventure Time, Adam Levine, and Bob Marley.
I think the site will be expanding into more home products and gift items such as shower curtains and iPhone covers. This is a newer site, but it is growing every day, and it's worth a visit to check out their offerings!