Here’s how to bake a "delicious and low-fat alternative to a regular cake" that would be "a great cake for a kids’ birthday party", according to one US website. That is, assuming you don’t mind the prospect and possible legal fallout of peddling this psychedelic cake to a roomful of tripping tots. The cake’s dominant ingredients are nutritionally inventive: Sprite and food colouring (the Sprite replaces the eggs, oil and water). But is this a potentially coma-inducing cocktail or a tweeny-turbo charge in cake form? If anyone is brave enough to volunteer their child for an experiment, we would be delighted to hear how the sparks fly.