Tuffits: Concrete stepping stones which look like pillows! Concrete stepping stones that look like vintage pillows. Get old pillows, lather with petroleum jelly, cover with plaster of paris. once hardened, remove pillow and fill mold with concrete!
From the book "Martine, petit rat de l'opéra" by Marcel Marlier & Gilbert Delahaye; or, as I knew it, "Anita no ballet". I remember propping this up on a music stand and doing the positions in my bedroom.