Robin likes to "read" me a book when Wolfy reads me a book. He picks out a board book he pretty much knows by heart and recites it, sometimes with a little prompting.
He is also doing the very beginning of the Saxon 1 Math book we got for Wolfy. Wolfy needed to start about 40 lessons in, although much of it is still really easy for him at that point. Robin is well-able to do the first lessons, although some bits of it he likes better than others.