I can't resist poking around with puzzles and matchstick puzzles are always a good distraction because they exercise the brain and you can do them as a problem solving activity or on a school field trip when you're waiting for the bus, or have them in stations. Of course we don't use matchsticks usually. Toothpicks, pine needles, twigs or anything long and thin will suffice. I was glad to run into this webpage with a great collection. Check it out. Jim Loy's Matchstick Puzzles.The one shown here described as an olive in a martini glass, but I just say it's a cherry at the bottom of an ice cream sundae glass. Move two matchsticks to redraw the glass so the cherry is outside the glass.
