Rainbow Hair Chalk

Instant colour, no commitment. Rub one of these chalks over your hair and you've got a streak of pink, red, purple, blue, green or yellow that washes out again with water and a mild shampoo.

It's a fun one for kids and teens, and a handy one for parties, festivals and dress-up days. Colour shows up best on lighter hair and is more subtle on dark hair, and as with any hair chalk it can rub off on clothes, so keep the white tops out of the way.

• 6 hair chalks: pink, red, purple, blue, green and yellow
• Works on dry or damp hair
• Washes out with water and mild shampoo
• Box size: 9.5 x 8 x 4.5 cm
• By OMY, a Paris studio