Hollow objects containing pebbles or clay pieces are found in numerous Iron Age sites in Israel, mainly in tombs. An instrument that was shaken, possibly a rattle, is mentioned as being played during David's transport of the Ark to Jerusalem thereby suggesting that this rattle was a musical instrument of the Iron Age. Rattles are also found in the Late Bronze Age in association with cultic installations; this has probably led to their interpretation as cultic objects in the Iron Age. However there is always the possibility that rattles were children's toys, just as they are today.