My dc's favourite game (even now they're adult is one my dm made up as a child). It was known as "mum's game" when I was little, not it's "granny's game".
You take out the picture cards and play with the numbers.
There are 10 rounds.
In each round you get the number of cards for the round. So round 1 = 1 card. round 2 = 2 cards etc.
You then take it in turn to pick and throw. You can pick up the unknown card, or the one that's just been thrown.
You have to put sets of cards into the right number for that round (ace = 1).
So Round 1, you can only go out with an ace.
Round 2, you could have Ace, Ace (adds up to 2) or two twos.
Eg Round 10 you might go out with 9,A 7,A 2 6,4 5,4,1
What you have left is your score for the round:
So if you had in round 10: 9,A 7,A 2 6,4 (all groups add up to 10) then 6, 8, 1 you would score 6+8+1=15.
Add up the scores for each round and lowest score wins.
My dc are all young adults, but a call of "Who wants to play granny's game?" normally has all three downstairs.
If you're playing with 4+ people then two packs of cards makes the later rounds more fun. We normally introduce the second pack of cards about round 5 or 6.