The word “hobby” is derived from “hobby horse,” which is a stick fitted with a wooden horse’s head, painted to look real. The child puts this between his legs, and prances about, pretending to be riding a horse. From this word “hobby-horse” we get the word hobby, an amusement; and we speak of a man’s “riding” his hobby. Properly, a hobby is any interesting subject or pursuit, not our main business, which we take up for our amusement in our leisure hours. What is a business to one man may be a hobby to another. For example, a professional photographer may have gardening as his hobby; and a paid gardener may make a hobby of photography.