Shaped just like a tasty bar of chocolate and wrapped in shiny foil with a paper sleeve, maths has never before looked so delicious. The chocolate scent revealed as the foil is removed is enough to make anyone's mouth water. Common multiplication, subtraction, addition and division problems can be solved using the calculator, and it runs from a solar powered battery. The best part, as the packaging says, is that it is absolutely fat free. Measures 20cm