Mum's or nan's have to make the cake to the nearest they can to the design. So nanny took on the task! Harleys instructions were, green, yellow and orange smarties on the top (I had to eat the rest), must be chocolate sponge and chocolate cream, which it is but I gave it a layer of sugar paste so it can be transported easier and less chance of little fingers pinching the cream. Here's the end result:
He hasn't seen it yet but I hope he likes it.