Eight picture cards, each labeled with one word, and the child decides: does the word match the picture? Three lions labeled “lions” is a yes. Two radishes labeled “radish” is a no.
Spotting a mistake is a different skill from writing the right answer, and a useful one. It asks a child to look closely at the end of the word rather than reading the start and assuming the rest.
About half the cards match and half do not, so a child cannot get through by circling yes all the way down. The sandbox card is a good one to stop on, because the word says sandboxes and there is only one.