What you can do
Choose two visible cards and check whether their picture labels match. A completed pair leaves the exercise. When all pairs have been found, the odd Sun remains. The page counts attempts and completed pairs without a countdown or ranking.
What is different
A full Old Maid round has separate hands and hidden draws between active players. The exercise has neither opponents nor a simulated hidden hand. It is designed to practise the matching step only.
Another teaching tool
The turn demo illustrates one fixed sequence using visible hands. It is not a random game or a multiplayer room. Both tools run locally in the page and reset when it is reloaded. No child account is created.