Organizations and corporations can help deck out Brookfield Zoo Chicago for the holidays at its annual Tree Trim. Sponsor a pre-lit tree and have fun decorating it with handmade or purchased ornaments. The cost, which includes signage and a limited number of admission and parking passes for Tree Trim days, is $195 for a community tree and $600 for a corporate tree. For more information and to register beginning September 2, visit brookfieldzoo.org/events or call (708) 688-8000. Not included in Zoo admission price, separate ticketed event.