I use craft acrylic paint for them. I start with a white base of acrylic with just the shape of the painting and then let that dry and finish painting in layers until it is the way I want it. Another cool idea for Halloween is to paint normal and then fill in areas with glow in the dark paint so that the eyes of bats glow, the windows in haunted houses glow, or make the moon glow. I used to just add $2 for the painted ones on top of normal pumpkin prices but now I have so many to paint I have raised the price. They sell for between $15.99 and $29.99 depending on how complicated the paint.