Please vote for this instructable and feel free to ask any questions.
Step 1: Materials
a x-acto knife
a piece of paper
Foam core poster board
a glue stick
a hot glue gun
Paints (and any extra materials to colour or design your USB)
Step 2: Design
NOTE: your design must accommodate for the size of the USB you are using
Step 3: Transferring the design
NOTE: do this step twice as your Shuriken will be two cut outs stuck together to accommodate the thickness of the USB
Step 4: Cutting out
NOTE: take time to cut your lines to keep them straight. Make sure your lines are cut properly to avoid tearing the poster board.