Common words from your childhood,that woukd have to be explained to your Grandchild.

Fluorescent socks

Counterpane
Bobby socks

Starch for clothes.

Shanks' Pony

Green soft soap

Spotted Dick

Seeing what's on 'The Box' when putting the tv on.

'Toni' home perm..

Ewbank carpet sweeper

I used to have a badge proclaiming 'I'm an £sd addict.'

I was helping at an old people's day centre, some years ago. In a quiz, they were asked "How much was a crown worth?" Blank looks all round.
So I asked " Well, how much was half a crown?" Instantly got the answer 2/6 so a crown must be 5/-.

Farthings.

Navy blue school knickers with a pocket. Ladies bloomers.

Threepenny bit
A tenner (6d)
Half a crown
Ten Bob
Halfpenny
A florin
Tuppence

Fortnight

Remember the party line on the phone. The line was shared with a neighbour, and you couldn't make a call if she was using her phone. But it was cheaper than having a line all to yourself. Now even kids have their own phones...

The first joke I remember hearing ( I think I was about four at the time) was "when is a door not a door? - when it's ajar" It took me years to understand the pun, and even then I didn't think it was that funny.

Halfpenny

A joke not understood now:

'What do you do if you are chased by a herd of elephants?'
A: - 'Dial Trunks and reverse the charge!'

Button B not button below fgs.

Button A and Button Below in a public phone box. Actually, public phone boxes in general. We've just had the last one in our area removed.

Petticoat showing?
It's raining in Paris.

Reverse charges when making a phone call

Sugar and butter for a sore throat

poultice - some sort of hot mush (possibly made from stale bread and hot water) which was put on your chest to cure a cold??