If they are comfortable and protected (from temperature, bugs, etc.) little ones generally love being outdoors, particularly if they are in motion. Some people take their crying babies on car rides as their secret weapon to calm them down… for our infant son, nothing worked better then bundling him up and taking him outside in the brisk winter air! For my family, hikes are our favorite outdoor activity. So my best advice is getting a comfortable child carrier, and head on out – any time of year. You’ll benefit from the [sleep deprived?!] stress release and exercise, and your little one will start acclimating early to having fun through outdoor recreation.