Cow Plus Boy Equals Cowboy
Teaching in its basic form; pictures. I used to love the books my older siblings had back in the 1950s and 60s where a small illustration would be inline with the text of the story. Such as: "the "illustration of dog" ran after the "illustration of fire truck". They were classic mid-century illustration technique with a wonderful "Dick and Jane" primer sensibility.
This same love has brought about a couple of illustrations I did called "Mathematics". Here's one of them, which currently hangs in the downtown bricked walking mall in Winchester Virgina, directly outside of the Discovery Museum... A choice spot!
I love the cow, in particular.