Make a pinata shell with chocolate and fill it with candies and jellies. Let the birthday person break open the cake to reveal the secret.
Make the occasion interesting by hiding a secret surprise in the middle of the cake.
Hide a secret message in between the layers of cake to create a surprise element.
Instead of lighting up a candle on top, this cake has a sheet of potato paper on top that burns away with a candle and reveals a secret message.
Create a globe with coloured sugar to cover the top of cake and break it away to reveal the secret.