Download Android Jelly Bean 4.2.2 stock firmware for Venstar K7 Children's Tablet from here or from here.
Archive name: Venstar K7 CVYF-74139 fw
Image: update.img
Archive file size: 274 MB
Boot version: 2.19
FW version: 4.2.02
Image: update.img
Archive file size: 274 MB
Boot version: 2.19