Work on memorization skills by learning parts of the instrument! Many parts of the instrument are named after the body. Start with going through the names a few times then testing on the parts: “What is this?” The parts of the bow should be learned too! Tip: use the real violin/viola—not just the drawing.
Also the names of the strings on your violin are: G D A E or "Good Dogs Always Eat" from low to high. On the viola, your strings are C G D A, let me know if you come up with a good phrase to memorize that one and I'll put it here in the site!