Bikes. One tandem and one Highracer. At 60 my balance is still fairly good (on a DF, bents? Unknown.). Trikes look like fun, but in urban Portland they are a little wide. SWMBO doesn't know about the Highracer yet, she thinks the tandem cost $4K. She is blind but does not miss a trick. She will find the Saki, sooner if not later, and I will say it is for extra bent practice so I can be as skilled on the laid back tandem as I am on our upright ones.