Spray paint the plant pot and base in glossy spray paint - I chose red, because it fits in with our decor. I also used a high-gloss paint, because I wanted it to have the appearance of metal, like a real gumball machine would be made out of.
Once dry, put hot glue on the fish bowl and place on top the upside down plant pot. Attach the knob to the plant base - which is now the lid of the gumball machine. Fill with your candy of choice and you have a nostalgic, vintage-esque, gumball machine!