Boo at the Zoo Advance Tickets are on sale NOW! Get yours now by visiting http://lafayette.in.gov/2146/Boo-at-the-Zoo or at one of the following area locations: Arni's (Lafayette, Shadeland, Rossville locations), Purdue Federal Credit Union, Once Upon a Child. Advance tickets are good any night of the event and are priced at just $6 per person, compared to $8 at the gate on event nights! As always, children 2 and under are free.