We have visited multiple state parks, our local Botanical Gardens multiple times, the local park, Colonial Williamsburg and the beach. I think the more time we spend outside the more comfortable my kids are getting. The bugs bother them less and they are getting used to seeing natural beauty. I hope they see the beauty and learn to respect it as they grow. Picking up after themselves, minimize their waste and enjoying it.
They are always pointing out a bird or mushroom even a rare flower gets their attention so I know they understand that it shouldn't be taken for granted.