After being read to from the better books, a child will often be interested in "seeing" the words for anything that interests him or her.
Richard Scarry's "Best Word Book Ever", with a large double-page spread devoted to a particular topic or area of interest, contains a jam-packed set of amusing animal characters enacting all sorts of work and using all sorts of equipment, machines etc. It can be read to the child (pointing to an item and reading the single word) but very soon early writers can be seen using it like a dictionary - looking up the picture and copying the word.
One book, three purposes: entertainment, reading, writing. Still available, and one of my first purchases for any new family.