Is your family starting to get a little restless from too much time spent indoors? Cabin fever isn’t just a matter of feeling bored or listless — it can also lead to major health problems. Experts have coined the term “nature-deficit disorder” to refer to a number of serious health problems caused by too little time outside. These range from high rates of childhood obesity to serious mood disorders such as anxiety and depression. So in short, getting outside isn’t just nice — it’s healthy.