What you need is, cardboard roller blind tube, wire,insulating tape. cooking timer. paint or dye. end caps.
Step 2: The Build
Cut the tube into 4 equal lengths, I used Magenta ink from a refill kit to paint them. Cut the wire into 4 , fit them to the end caps. Strap the sticks of TNT together with tape. Stick the timer over the end of the wires.