Things you weren't allowed as a kid

[Sundae]

All of the below were monitored and strictly rationed. So not outright prohibited, but definitely supervised in a way they weren't in friends' houses:

Heating
Biscuits
Any food between meals actually
All chocolate even at Easter and Christmas - yeah, thanks Steven, the year you ate a whole Selection Pack before Christmas Dinner and the year you threw up chocolate all over your bedroom on Easter Sunday caused that little restriction.

Expressly forbidden:

Boiled sweets
Milk bottles on the table or side - it had to be poured from the bottle into a jug
Eating or drinking in the street
Drinking from a can
Reading at the table, even breakfast or a casual sandwich lunch
Leaving any food on your plate

[Carruthers]

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 Nut® 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.

[monster]

Originally Posted by Carruthers

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.

When we were finally allowed gum as a special treat, we weren't allowed bubble gum.

The rules we had to follow for manners were a little unbelievable looking back. probably why I'm so rude now and drink so much diet coke.

[Gravdigr]

Originally Posted by Sundae

Boiled sweets...

Translation, please?

[Carruthers]

Originally Posted by Gravdigr

Translation, please?

It seems that they are known as hard candy in the US.

Wiki article.