A mesh toy bag that's supposed to hang on an umbrella stroller. I didn't have an umbrella stroller, so I couldn't use it.
A cassette player that hangs on the side of a crib. It had a night light built into it, too. It didn't hang right and I was afraid it would fall off on the baby's head. It also didn't play the tapes like it was supposed to.
A formula dispenser. It had three different snap-on pieces and you were supposed to be able to pour powdered formula out of it in single serving sizes or something. Just looking at the sheet mechanics of the thing, I knew it wasn't going to work the way it was supposed to.
All of these things were bought by the same person, BTW. . . MIL!