I like frogs, and I know that I'm not the only photographer who does. If one owns a big, expensive supertelephoto lens, it is easy to use it for any subject that comes along, including skitish frogs. However, most of us will not find photographing frogs high enough on the justification list for the purchase of such a lenses.
Fortunately, there are two very affordable long focal length frog photography lens options available. Canon's RF 600mm F11 IS STM and RF 800mm F11 IS STM Lenses are able to nicely capture these subjects from non-threatening distances.
These lenses are simple to use — F/11 and be there simple. Having a single aperture setting available simplifies exposure settings, and the relatively deep depth of field makes keeping the subject in focus easy. These are aspects that casual photographers and beginners, including kids, can appreciate.