You have truly maximised a normal scooter and bicycle Libby-Ellen. You have designed everything so neatly in your drawing, you have displayed all of the various parts of your invention with helpful labels, I really like the fire boost for extra speed! A magical seat for tired legs would be a much needed addition when going on long journeys and the addition of a third seat and wheel for an extra rider are really good ideas. Well done for thinking up new and exciting ways to improve bikes and scooters, keep that inventive mind going!