i think "bang" (play dead) is such a useful trick, can be used to clean their feet when they come indoors. I use that trick every time it's wet outside.
i'd guess "bang" would be in either easy or intermediate level.(?)
not sure it could be as easily captured/demonstrated in still photos,
but, it's such a USEFUL trick.
"Smile" is useful and easy "capturing" trick, too. Just is so cute. I sometimes wonder if when Buddy smiles, it helps him feel the way he now looks....rewarding his smile did seem to increase the amt of time he spends smiling, so is good trick for serious natured or fearful dogs.