I have been conducting an experiment over the past few weeks. The idea is to see if children prefer black toys. Basically we empty the toy box full of red, yellow, green and blue plastic onto the middle of the carpet. To that pile, I add the remote controls, a glasses case, the camera case and as a control object (to check its not functionality that decides the usefulness) a defunct mobile phone (not mine I hasten to add, although it might as well be my current one for the use it gets!) Absolutely 100% of the time the primary coloured plastic gets trampled in favour of the black. So, here’s some advice to toy manufacturers, please, just make everything from black plastic.