Two-wheeled ride-along bike trailer large enough to carry a teenager. Someone was selling this exact thing in 2019 in Lake Cowichan, and the ad's expired, but I can't find a way to contact the person! If you know that person, and they're still looking to sell, I'd cheerfully give you a finder's fee. http://www.morgancycle.com/Caboose-Trailer-Bike-Pedal-Bicycle-Trailer_p_119.html