With infants, talk about what you’re doing and thinking: Take a tour of the yard/neighborhood. Put your infant in a carrier or carry them in your arms and take a walk around. Look at the houses, cars, and people and comment on what you see. As you walk around, also look for any plants and animals and point them out to your baby. "I see a pine tree", "I see a dog".
With toddlers, comment on what they’re doing or looking at: When your toddler is curious about something, ask them about it. For example, if they stop to look at a car, ask them what they notice and what they like about it. “What color is that car? Do you see the wheels? Do you see any other cars? Is that one the same or different?”