Kevin Federline took his two children to Las Vegas for the weekend.
The 28-year-old - who has custody of sons 18-month-old Sean Preston and six-month-old Jayden James while estranged wife Britney Spears is in rehab - travelled to Las Vegas for an appearance at the Mirage Hotel andCasino lounge Revolution.
A source told People magazine: "Kevin was really low key. You could definitely tell he was on his best behaviour. He was having a good time, but wasn't the wild, crazy Kevin who used to come to Vegas."
The aspiring rapper arrived on Saturday with the boys, a nanny, his mother, brother and two bodyguards.
He dined with family and friends at the hotel restaurant Japonais.
The source added: "He was late for dinner because he wanted to tuck his kids into bed."
