When you have TWO you must make room for TWO! lol
The black and white pic is of my mother and her twin sister on a Dual Deck Tricycle back in the 1940's. They were born in '43 so this is probably around '47 or '48 if I had to guess. The picture to the right of that is one of my two trying to S-Q-U-E-E-Z-E into our fabulous Kettler Happy Air Navigator. As you can see in the image below that we added a "Kettrike Tandom Insert Seat" so both of them could enjoy the fun and go explore together. The photo was taken out near Mormon Lake in Northern AZ.