My buddy did this at my place when he saw I had a pile of plastic dinosaurs. It was fun for a while, finding a little dino buddy surprise on the windowsill, behind the TV, on top of the bookshelf, hanging from the dining room light fixture, in the silverware drawer, etc. We had a good laugh, and after I'd collected them he did it again another time he was over. This time he hid them better, in my sock drawer, among my old CDs, inside the cover of a couch cushion, next to my toothbrush. But I had to draw the line when I found a dinosaur inside the ketchup bottle in my fridge.