I have some leftover house paint. Can I use it paint the plant pots?
What exactly do you want to do with them? Do you want them to be for inside or out? You could paint some plain yogurt on the side and make a mossy patina. There are all sorts of things to do with them. Good luck!
If you use latex on clay pots, you might want to put a sealant coat on top to help it last a little longer.
If they're plastic pots, you need a special paint that adheres to plastic.