A clay Passover seder plate is a sweet little craft that you can make with air drying clay, polymer clay or classic clay that requires kiln firing. Given that Passover is just six days away, I'd go for the polymer clay idea which is the quickest and won't require any firing. Plus then kids can also make the various items that are placed on the plate as well......hmmm that sounds so cute maybe I'll try to squeeze that into my kid's schedules this week!
Then again, air drying clay could also work if you're not pressed for time, and the results can look very close to the example I've shown here. Air drying clay comes in both white and terra cotta color as far as I know, so if you prefer bright colors, do choose the white air drying clay, and follow the simple steps I've outlined for you, because I know, a week before Pesach keeping things as simple as possible is certainly a good idea!