Paints are far from non-toxic until they are set. Once the paint is dry the toxicity is locked up. Three-part paints are the worst, the kind that once mixed will set whether you were ready or not. If you want to be very sure the paint is harmless, bake the painted birdhouses in a very gently warm oven for a half-hour.
Good morning.. I suggest that you use "Patio Paints" made by DecoArt- they are strictly for indoor/outdoor projects and I do have a few instructions leaflets for birdbaths from Terra Cotta Pots and it suggests to use these type paints. Good luck..oh, you can find them at Michaels or Hobby Lobby. I have not seen them at any Walmart.
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