Welcome to the Cake Decorators Q&A

I have been asked to make a cake which covers three themes, 25th wedding anniversary, 18th birthday and 21st birthday. All three are being celebrated at a friends party. Does anyone have any ideas how to incorporate all three themes in either one big cake or three smaller ones?

When I had to do a single cake with three themes (new home/birthday/birthday) I divided the cake into 3 different sections with royal icing with each third decorated in a different colour – pink third, green and blue – looked really good.