Make your birthday celebration complete with a special delivery on an 8 ft. Giant Blow Up Birthday Cake. Because the cake is two-tiered you may request customized message for that special someone. This is one of our most popular designs and you have the option of creating your own color scheme based on the same design or create a cake all your own! The Giant 8 ft. Blow Up Birthday Cake is available for Purchase or Rental and will create a festive atmosphere for at every celebration. This lovely design is easy to set up and take down just as quickly as blowing out the cake candles.