I have that problem when buying presents for my mother. She's taken up a serious interest in painting during her retirement years. The things I'd think to buy

I have that problem when buying presents for my mother. She's taken up a serious interest in painting during her retirement years. The things I'd think to buy would be below her level or are things she already owns (perhaps because they were a gift from me when she was early in her artistic journey). The big-ticket stuff would be already gifted to her by my dad as a gift to celebrate their wedding anniversary.