The family bought the lie-catcher robot
(yep, the lcr HDX134)
and it was the boy
who was caught first
when his dad asked him
where he'd been all day
and he replied:
"I've been at the library all day, dad"
lcr HDX134 slapped the boy

The dad went berserk
and he said to his son:
"When I was your age, Tim -
I never told a lie!"
lcr HDX134 slapped the dad

And the boy's mom said:
"Don't be too harsh on Tim -
he's bound to tell lies;
after all, he's your son"
lcr HDX134  slapped the mom