Stare in awe at Dudley's tail
From Create Your Own Story
Rubeus Hagrid says 'would you mind not telling any other wizards about that? You see, I'm not supposed to use magic'.
You nod.
While the Dursleys are trying to rip Dudley's tail off, he asks 'I'm here to inform you that you have been accepted at the Hogwards school of witchcraft and wizardry. I'm here to take you to get your supplies.
Do you: Go with Hagrid to get your supplies. Say 'I'd rather stay home'. Ask more questions.