My MOM'S Club is doing this for a spring party, or more precisely, having the kids do it. They each will have a pot to decorate and plant stuff in. What is the easiest and least staining method? Tempura paint? Is another kind better? Can you use markers? What about washable markers...bad idea since it's a clay pot? I don't know if it's more important to use a washable medium or to let them kids get stained so the pots are more lasting. We will not (I don't think) be putting polyurethane on them at the party, as they will not have time to dry. That is what got me thinking about markers. They dry much more quickly, but I don't know how well they will take to flower pots. Anyone have any experience? TIA!