A gift token for an art shop is your best option for me. It will almost certainly be well received . Everything to do with art is totally personal to the artist and buying is risky and can take away the kind thought. Hope this helps.
Indeed, indeed, Repentance oft before, I swore---but was I sober when I swore?
And then and then came Spring, and Rose-in-hand, My thread-bare Penitence apieces tore.