More than 3,500 people will dress in costume and head for historic downtown Wylie from 6 to 8 p.m. Thursday, Oct. 26, 2017, for Boo on Ballard, a free trick-or-treat event sponsored by the Wylie Downtown Merchants Association and the City of Wylie. Kids will trick-or-treat with local merchants in a controlled, safe environment. Wylie Parks and Recreation hosts Glow in the Park at Olde City Park, 112 S. Ballard, from 5:30 to 8:30 p.m.; activities include bungee trampoline, zip line, foam canon pit, and a live DJ. Glow-in-the-dark swag, like necklaces and wands, available for purchase. Victorian Haunt at the Brown House, 301 N. Ballard.