We have released Multiplayer Kids Racing Free !
It is a free multiplayer game for kids from 2 to 10, where they can race over the hills, peaks and ramps around the map with their friends doing frontflip, backflip and other stunts.
Video: https://www.youtube.com/watch?v=JAMHgNcf8lQ
Link: https://play.google.com/store/apps/details?id=com.techneplay.onlinekidracing