Best done outdoors on a calm weather day (unless you want to dye more than the shirt) or indoors as I did with precautions (drop cloth).
Use one color or multiple colors.
Step 1: Materials
Bubble Blowing Gun
Piece of Cardboard for inside shirt
Plastic Drop Cloth (if dyeing in the bathtub)
Spray bottle with water (optional)
Iron and Ironing Board
Thin Cotton fabric to use as a press cloth