A plurale tantum is a noun that appears only in the plural form and does not have a singular variant for referring to a single object. (for example: jeans, dibs, means, clothes, binoculars, etc.)
Here you can find a comprehensive list of such nouns.
With Far Out! Exploring Nature with Binoculars, not only do kids get their own set of binoculars, but they also get to read fascinating facts about animals. The guide explains how to use the binoculars, what animals to look for in different habitats, and how to observe them, as well as handy tips on exploring nature.