That is my "hobby" I have extended it to general advertising, through various organisations connected with old or poor people. Give the odd talk etc. As an underpaid pensioner myself, I do charge for overheads such as travel to the venue, but, of course, this cost is usually shared between several persons. I do seem to collect "gifts" of appreciation. For some odd reason, this is often a bottle of red wine! My cellar overfloweth!!