I remember when my friend and I made a birthday cake for her mother. We were about ten, I think. The recipe called for 8 teaspoons of baking powder. we put in 8 teaspoons of baking soda and after mixing, we realised what we had done. "Aunt May" next door came to our rescue and tild us to put in 8 spoons of cream of tarter. It came out OK. A bit high and fluffy though. Nola's mother was 35 and we put 35 paper flags and 35 candles on the cake -- Instant bonfire!!!!