I don't recall too many restrictions but bizarrely, although I was allowed chewing gum, I wasn't allowed bubble gum.
Some of my childhood friends could blow Olympic standard bubbles which only served to provoke envy.
Dwellars on this side of the Atlantic might recall Beech NutŪ chewing gum which was dispensed from a vending machine of sorts.
Every fourth turn of the control on the side produced a bonus pack.
At one (old) penny a time, it was good value especially if you were lucky enough to be in line for the bonus.
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