There are some fun sites online where you can decorate a virtual tree!
Here are a few of my favorites!
This site is beautiful and you can even turn the lights off so it glows!
This one is fun because it gives you many choices, allows you to stretch and rotate items, as well as the ability to print your finished tree!
Lowe's Elf-Tacular Christmas Tree Builder site is full of fun and the little elves that help you are a hoot! You can also share your tree with others!