What gift did you give your mother-in-law (aside from a grandchild haha) that she really appreciated?

In my experience, a MIL will best appreciate the gift of love and happiness. Not necessarily towards her but towards her son. Seeing her precious son happy and loved in all the ways he needs by the woman he married is the best gift one can give. All moms want the best for their child - even after they get married and start families of their own.