To make a Christmas tent, you will need the following supplies: a large sheet of tarp or plastic, a few stakes, some rope or string, and a few decorations. First, spread out the tarp on the ground. Then, stake the corners of the tarp down with the stakes to create a tent-like structure. Next, use the rope or string to tie the sides of the tarp together, creating a semi-permanent tent. Finally, decorate the inside and outside of the tent with Christmas decorations to create a festive atmosphere.