Inside the Eggis a poem by Carol Ann Duffy. It is one of those poems like a Russian doll, one thing is inside another and inside that another and another. It can go on for ever if you are not careful – or just of you enjoy it. Ted Hughes’ poem Amuletworks in a similar way and comes back to its beginning, like an amulet, within thirteen lines.
Inside the Egg Inside the egg, unheard, Was a bird. Inside the bird, unsung Was a song. Inside the song, mute, Was a flute. Inside the flute, wound, Was the wind…. from New & Collected Poems for Children Carol Ann Duffy
…and so on. You could carry on from here or begin with a different object. You may or may not wish to rhyme. The pattern Carol Ann Duffy has created, often using half rhymes [ unsung/ song; wound/ wind], is a satisfying one and easier not to get wrong than in some cases.
This doesn’t have to be a poem. Just play a little with the idea of an infinity of things, one inside another.