Credits go to Joy sensei who said that these would make good props for teaching the "Kore wa nan desu ka?" (What's this?) pattern. It's funny because I recently read somewhere that although that type of sentence pattern, such as "Sore wa hon desu ka?" (Is that a book?) Hai, kore wa hon desu (Yes, it is) Iie, kore wa hon ja arimasen, jisho desu (Nah, it's a dictionary) occurs frequently in grammar texts, they rarely get used in real life. I beg to disagree. There are lots of times we ask someone what a thing is, eventhough most of the time we already know perfectly well. Like, Is that a PSP? which often preludes to the questioner borrowing said object.
Anyway, back to the picture. Kore wa nan da to omoimasu ka? (What do you think it is?)