Back home, write either a list of adjectives describing these found objects, or put it into a piece of descriptive prose. Now, using your list or the description, imagine a character and describe them in the same language as the natural object. For example, if you had found a conker, you could compare the prickly outer shell to a prickly personality perhaps concealing glossy depths or you could imagine a child, whose potential is only just beginning to peep out from a shell of parental protection. Or, 'she had spiky hair, but the brownest eyes you ever saw...'.
Then having invented a couple of characters, put them in a scene and see how they play off each other, trying to keep some of the descriptive language you started with.