noun
spot the difference; photo hunt
A puzzle where you find differences between two similar pictures. 間違い探し is the standard Japanese term; 'photo hunt' is a less common English equivalent.
子供向けの雑誌に間違い探しが載っている。
There is a spot-the-difference puzzle in the children's magazine.
この間違い探し
This spot-the-difference puzzle is so hard that I can't find all of them easily.