Trace the Christmas tree template onto the green stiff felt. The template comes in two pieces, so you'll need to line up the two pieces first.
Trace the tree trunk onto brown felt, cut it out and glue to the back of the tree.
Trace the star onto yellow felt, cut it out and glue to the top of the tree.
Trace the ornament template onto different colored felt pieces and cut them out. Don't glue the ornaments to the tree, they will stick to the green felt tree on their own.