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

Home perms (Which Twin has the Toni?)

Bus conductors

Green Shield stamp books

Mangle
Gas poker
Perm
The test card
Blancmange
The hit parade

Words/phrases like "swinging", "dodgy" "oo-er" "fab" "funny peculiar"

Twin set
Mods and rockers
The lurgy
Usherette
Purple heart
French letter
Gramophone/78s
Beehive
Setting lotion
Half day closing
Bubble car
Trolley bus

Betamax - they thought it was a cinema. Choke as applied to a car. Describing someone as a fly by night - caused much hilarity. There have to be more .

Fly paper (gross)

Moth balls (also gross)

My grandchildren ask me what I earned when I started work I told the how much I earned each month and then said I gave up £xx for my keep they all said what's keep ?

Tapes. VHS or cassette.

I was born in the eighties

Darning
Powder puff
Swotting
Snogging
Bodkin
Collar and stud

There are also much more recent things that today's children wouldn't know such as walkman. They probably haven't seen a p.c. either, just laptops.

Turning on the TV at least 5 minutes before your programme began so that the set could warm up.

Hand knitted long stockings

Some liberty bodices had tapes instead of buttons. The tapes went through a loop at top of stockings and were tied in a bow.
Rollers
String bags
Companion set
Carpet sweeper
Hair net
“something for the weekend”?

Combinations. I'm not old enough to have worn them but I do remember an old lady we knew wearing them... a sort of cosy 'onesie' - an item of underwear with a handy aperture for visits to the loo!

Coal scuttle

FarNorth We had candlewick bedspreads when I was little but we called them 'counterpanes'. Strange word!

Spot the Ball, reel to reel tape reorder, radiogram, paraffin heater, chilblains, stone pig....oh the list could go on and on!

Candlewick bedspread

Liberty bodice: collections.vam.ac.uk/item/O1122034/girls-liberty-bodice/
I had one, didn't like it much but was warm. They had rubber buttons so as not to break them when going through the mangle!

Sorry about typos. I meant vest like but thicker.

Negatives, as in photo negatives

Wireless

Watching TV with the curtains drawn and the lights off.
Grumppa I dint think boys had liberty bodices but most (all?) Girls in the 1950s were forced to wear tgese garments over their vests in the winter. They were vet lije but thinker (a bit fleecy? ) with odd tapes running down the front and back and buttons at the bottom. My mother told me when she was a child (around 1910-1920) suspenders (for black stockings) were attached to the buttons. They were a more comfortable substitute for corsets hence the 'liberty' bit.

Paraffin stove

Quite a few of these would have to be explained to my children (now in their mid-forties), let alone my grandchildren!

Car indicators that flipped up by the drivers door. Hand signals for slowing down or turning left.