Hoy leads Great Britain medal charge in Melbourne; cycling.
Ed Clancy was second after three events of the six-event omnium, while Britain opted not to enter the women's team pursuit and the men's Madison, a non-Olympic event.
Kenny, Hoy -Olympic champions in the event -and Crampton finished third in last month's European Championships, but responded with gold today after qualifying fastest.
The British team met New Zealand in the final of the three-man, three-lap event, bettering their heat time to clock 43.829 seconds and take gold.
Pendleton and Varnish finished second to China in the two-woman, two-lap women's team sprint.
The British duo qualified second fastest and clocked 33.562secs in the final, but China duo Guo Shuang and Gong Jinjie were 0.322secs quicker as they took gold.
Clancy won the opening event of the omnium, the flying lap, was 12th in the points race and sixth in the elimination race.
Today will see Pendleton and Varnish in action in the women's sprint and Hoy riding in the men's Keirin.