Treasure finding game using magnets
Treasure Chest, pictures of treasure, gold, fish, scrap metal with paper clips attached, etc, magnet on boat hooks
Fill Treasure Chest with picture (with paper clips attached), give each team a boat hook with a magnet attached, children take it in turns to hook out things. Is it treasure or not. Use a point system to see who wins. e.g. gold = 10 points, scrap metal = -1 point.