It's good to control your children.
Tom takes his kids, Lee and Brad, to a toy store to get some Lego; the checkout line is long and the boys get bored waiting.
Tom wants to purchase the Lego for Lee and Brad.
Tom keeps an eye on the kids, and suggests they sit on one of the benches and play on his phone while they wait.
Tom ignores the boys, playing games on his phone while he waits in line; the boys start playing with stuff on the displays.
The boys are quiet and well behaved, and the store clerk hands them each a lollipop as she packages up the Lego.
The boys manage to knock over and break an expensive item, which Tom is obliged to pay for; the store asks them not to return.