Being just a tad younger, I can remember limited edition HOT WHEELS tm Cars that required several Wheeties
(I think) box tops each. My family soon grew disgusted of the cereal that I had to have. Wish I had known then what Limited edition hot wheels would be valued at today.
Also, in the late 60's the baking soda subs were upgraded to include a small electric motor, not only would they dive and surface, but they would also putter around the wading pool/bathtub. Some where in the bottom of a local swimming hole there lies a plastic submarine that had more dives in it than it had surfaces. To keep this musically related, maybe I should have named her the Mary Ellen Carter. I did run a salvage operation for about a week trying to recover her, and then a young boys mind drifted on to something else, probably the limited edition hot wheels.

Chip2447(wondering if this is the reason why I wanted nothing to do with submarines when I served in Uncle Sam's Yacht Club?)