WAUKESHA COUNTY, Wis. (CBS 58) -- The trial is now underway for a former Pewaukee school bus driver accused of sexually assaulting children. 

Investigators say 63-year-old Thomas Felser told girls they were playing a game called "monster," and had them sit in the back of the bus. 

That's where Felser is accused of assaulting them. 

Jury selection started Monday morning, May 4, in Waukesha County. 

Felser is charged with four counts of repeated sexual assault of a child and seven counts of sexual misconduct by school staff.