Ah, a Christmas tree drawing! That's a wonderful idea for a holiday-themed drawing. Let's get started. First, you'll need to draw a simple outline of a tree. Start with a tall, conical shape and then add branches coming out from the sides. Add some ornaments and lights to decorate the tree, and then add a star on top. Finally, color the tree in green and add some highlights to make it sparkle. Don't forget to add some snow on the ground for an extra festive touch!