Food colouring pens are the no-mess way to decorate, and the ones the kids can actually join in with. Rainbow Dust Cake Art Pens work like a felt tip, but the ink is edible, so you can write, draw and add fine detail straight onto set icing, sugarpaste, chocolate and cookies. Twelve colours, including bright gold and silver grey for metallic touches. Buy singly to top up a colour, or grab the multipack of five to cover the basics. They come into their own for lettering on birthday bakes, drawing faces on biscuits, or detail that is too fiddly for a brush. Let the surface firm up first and the colour goes on clean and sharp.