More than 50 tons of snow for animals and zoo visitors highlights this event, with select animals receiving fresh snow in their exhibits and icy treats as part of a regular behavioral enrichment program. Wet and wild play areas add to the fun. 7-11 a.m. Included with zoo admission: $24.95, adults; $16.95, children 3-13, with discounts online for advance purchase. Phoenix Zoo, 455 N. Galvin Pkwy., Phoenix, phoenixzoo.org, 602-286-3800.