The children place the 24 people cards face down in a grid and take
it in turns to flip over any two cards
- if the two cards add up to 10 the player may keep them
- if the two cards total some other number then they are flipped back over again in place.
The next player now chooses two cards to turn over. The game proceeds in this way until all of the cards have been matched.
Taken from Matchsticks Makes 10