Possible Clues:

• Method of knotting and colouring to produce pattern
• Color, as a hippie's shirt
• Stain by knotting fabric to produce a pattern
• Make colorful T-shirts, in a way
• Color clothes, in a way
• Decorate fabric, '60s style
• Batik kin
• Method of colouring garment in which it is knotted
• Psychedelic coloration
• Do a camp project