@blueveinedthrobber,
I sent my daughter an old "rhythm band" school box and two really primo tin drums. They'll all appreciate it because they're just kids especially my daughter and her husband.
Still looking for the right toy piano.
Used to give my unfavorite brother in law's kid's kazoos, stadium horns, permanent markers, silly string, plastic harmonicas, plastic accordions. In the right hands with the right parents that would have been great presents.