My son had a Charlie and the Chocolate Factory themed birthday party for his 6th birthday, I had too many ideas for this cake do it ended up being 6 tiers.
A combination of sponge and polystyrene rounds made up the cake with a chocolate fountain glass tube. Modelling paste figures of Willy Wonka and our son, shooting stars, top hat made with a polystyrene dummy, candy canes, lollipops, toadstools and a golden ticket that unfortunately broke in half in transit :-(.
When we lit the candles I had placed sparklers and an indoor firework in the top hat which the children loved.
He was ecstatic and his friends loved it.