This is a tree I made last year, and it has made a reappearance this year. I bought a huge piece of green felt, and cut in to a triangle shape. I could have made it more tree shaped, but I can never cut things like this symmetrically. I then bought a few smaller pieces of other coloured felts, and cut lots of baubles, presents and a star.
The felt sticks to the felt, so the kids can rearrange their tree as often as they want, and leave my tree alone! Brilliant for when you have crawling babies/toddlers and you want a tree without them pulling it over!