Djeco's Do It Yourself Pixel Art Heroes shrink plastic keychain kit is a set for making five pixel-art hero keychains using shrink plastic. Place a colouring template under each transparent plastic shape, colour it in with the included mini coloured pencils, then bake it in a preheated oven — with an adult's help — and watch it shrink and harden in minutes. Once cooled, attach each piece to a metal cable with a screw closure and the keychains are ready to use or give away.

• Recommended for ages 6-10 years.