What has a stem, leaves, and beautiful colors, but cannot walk?

I sit on a letter and can travel far without moving myself. What am I? Solve the riddle → I have teeth but cannot eat. I make your hair neat, but I am not a hairdresser. What am I? Solve the riddle → I grow bigger every year and never shrink. What am I? Solve the riddle → I am yellow and squeaky, and I love to float in your bath. I have no real feathers, but I'm often called a bird. What am I? Solve the riddle → I have many cheerful colors, but I'm not a rainbow. I have a bow, but I shoot no arrows. When you play me, I sing. What am I? Solve the riddle →