See how many shapes and colors you find. Look up for birds and down for animal tracks. Note the different sounds in the city and country. Pay attention to pollution. Teach your child how to tell when berries are ripe.
Orchards also make good visits at harvest time.
Visit a farmer's market. Admire the mounds of fresh lettuce, berries and newly baked goods. Compare the different kinds of tomatoes, squash and other vegetables. Note the different smells and colors. Look for new, unusual fruits or vegetables to try.