Pictures are excellent teaching and memory devises. It doesn't take many words to get a point across, if you have adequate stick figures or symbols. Certainly you don't have to be an artist. I remember drawing on the back of the worship bulletin to illustrate for my children the sermon. It definitely kept me listening, and hopefully it helped them too.
In Classical Conversations we are memorizing together Exodus 20. Today it was: "Thou shalt not covet thy neighbor's house" I drew on the white board a guy next to his house looking and pointing over at his neighbor's house and thinking- "I'd like to have that house." Each time we said the verse I wiped off a word or picture. It's a great way to learn a large passage. Young children, as well as some adults such as myself, tend to be more visual and will benefit from the use of simple artwork. It will also remain in the mind for future reference.
My husband was explaining something to a child in the above pictures. See if you can figure out what he's saying.