Autocad Software (or hand drawn)
Laser Engraver (or scissors)
Step 1: Creating Pieces
Design 2-D shapes on AutoCad Architecture
Print out shapes with a laser engraver and matboard
Step 2: Constructing 3-D Puzzle Pieces
Tape pieces together to construct 3-D shapes
Step 3: Creating the Connectors
Use scissors to cut the plastic straws to various lengths
Step 4: Putting It Together
Take your 3-D shapes and pieces of straws to put the pieces where they would go if the completed shape (my example cube) was formed. Then hot glue the pieces in place. Let sit and dry.
Step 5: Customization
Paint or design your new ornament to your choosing!