We recently went through some Seligman stuff floating around to decorate @cettel's desk and happened upon a Myachi:
It claims to be "the original handsack" (...phrasing?) but really it's just a square hackeysack that you hit with your hands, I guess? When I saw it I immediately had to look up this terrible commercial that I remember seeing years ago:
They even created characters to try to sell it to hip youngsters, Myachi Man and Kid Myachi (I couldn't make this up if I tried).
Now that I've stopped laughing, I need more terrible toys with bad commercials.