I also thought of GooGoo's as soon as I saw this topic. I remember being disappointed in them. When we first arrived in Knoxpatch 20 years ago, we were given a box of them, maybe 24 in the box and I threw out 20. 4 kids and none would eat a second one.
I'm more a fan of long gone or almost gone candy like the Nestle Skybar or Necco Wafers or b-b-bats or Sugar Daddys.