Here's a quick and fun project for your kids - and the result is a professional looking decoration!
Start with a foam cone. I found mine at the Dollar Tree (score!). Lay out some newspapers or an old table cloth and have your child paint the whole thing green. I had Molly (4) use a foam brush and it worked out great - didn't take so long that she lost interest! I really liked just getting out one color of paint and cleaning just one brush!
While the paint is still wet, sprinkle it all over with glitter. Do this over a sheet of paper or a paper plate so you can save any extra glitter that spills! We made a single tree that's about 6 inches tall and I love it! If your child has the attention span for it, create a whole forest of these wonderful sparkly trees to display!