Collect items from outdoors or your refrigerator, berries, leaves, flowers, soil, charcoal from a campfire or fire pit. Some items will be wetter than others, some you will want to have a bit damp (like the soil). If you want more water colors, you will want to use a paint brush and some jar lids or small bowls with smashed berries or the juice of fruits or vegetables. Some vegetable skins work too, like tomato, carrot and eggplant. BE CAREFUL of things collected outdoors, some berries, mushrooms, and plants can be harmful if swallowed. Wash hands well if using outdoor items.