A childhood belief about fairies

i remember once my 4 year old brother lost a tooth, my mum told him to put his tooth under the pillow for the tooth fairy. He said to my mum 'oh mum make sure you let the tooth fairy know i want paper money' When he woke up the next morning with $5 i realised that you had to request the amount you wanted from the tooth fairy. I felt so stupid because i was probably half way through my baby teeth and had missed out on all this potential cash!