Surely she would go even faster if you made her a wooden one that weighed 50 lbs or more. After all, since both wheels spin forward, they must be going downhill…so biking is a gravity sport and performance would be aided by increased mass
(I hope you know I’m needling you Roy - its a cool article & hearty goodonyas to your Aunt )
Those twins (Robin and Hazel) used to get up to some mischief (as identical twins do) they were also known as the Heinz twins when they were kids in Australia, they used to advertise Heinz baked beans. . . jumping out of giant baked bean tins and so on. . the slogan being “Double the quantity and twice as nice!” . . . so as you can see, shamless self promotion runs in the family beans ( I mean genes) , pink wetsuits, whatever !