My wife set up a decoration cake. She bought a sponge base, strawberries, objects made by chocolate, and whipped cream. Then she assembled them into the decoration cake. The cost of those materials was 1700 yen ($16.35 €11.97). Strangely my daughter does not like sweet whipped cream, and does not eat a white layer cake. This time sponge was not usual yellow sponge but chocolate sponge, so she ate it. My wife may be going to set up a chocolate cake next time for the daughter.