Mild hikes are popular with families visiting with babies. We have fantastic beachfront parks, like Ellen Browning Scripps Park in La Jolla where you can lay out a blanket and let them roll around or sit in shade or sun for bird watching or a peek at the seals. Dip their toes in the ocean at one of our family-friendly beaches and get them up-close with fish at Birch Aquarium or even bigger animals at the San Diego Zoo. Check my list of best San Diego hotel pools for one to swish around with them in at the end of the day. If your baby naps well in the car, drive parts of our famous 59-mile scenic drive. While he or she sleeps, you can listen to tunes and sightsee. Plan at least three hours to make the loop or split it into multiple days.