Print out a pattern you like, place a sheet of wax paper over it and trace the pattern with puffy paints. When it dries peel it off the wax paper and apply it to it's permanent surface.
(This gal has lots of great ideas!)
DIY 3-D Lettering. Print words in preferred font size. Place wax paper over print apply thin coat of dish detergent diluted with tiny bit of water. Trace outline of letters on wax paper with glue gun. Let glue dry. Carefully pull letters off paper. Paint 3D letters glue to project with small amount of hot glue. That's it! Amazing!