How long have Jacy and Kacy been alive?
The sisters have a span of existence which is unknown. The span of time they have experienced is kept confidential. Nobody can accurately determine the exact age that Jacy and Kacy. The sisters are inclined to keep this information a secret. One cannot find a definitive answer about the number of years they have lived. Rather, it is an intriguing part of their persona.
Real vs Prank Slime Challenge ~ Jacy and Kacy YouTube