Grover Norquist is "the" Republican anti-tax guru. That is all he does; that is all he is known for. His organization, Americans for Tax Reform, exists for the purpose of grousing that all taxes are too high and all government is too big. So he probably imagined he was making a terribly clever point when he took to Twitter to share an anecdote on his parenting skills.
It did not go well, which on Twitter can be a truly glorious thing. Shall we bask in just a few of the many, many replies?
For the record, Grover did later pipe up to say that he paid the tax that he should have already explained to his daughter on the way to Ye Olde Guitar Shoppe.
Also for the record, this anecdote supposes that an 8-year-old living in Grover Norquist's own house had never heard of this notion called taxes until just now. All righty then.