7 a.m. to 6 p.m. — Winter Blast Camp, offering field trips and activities for children in kindergarten through sixth grade, at the Denton Civic Center, at 321 E. McKinney St. Cost is $28 per day. To register, visit the Civic Center. Visit www.dentonparks.com.
4 p.m. — Origami Yoda Party at Emily Fowler Central Library, 502 Oakland St. Free. Kids ages 8-12 can eat snacks, talk about the book series by Tom Angleberger, and make Origami Yoda characters. Call 940-349-8752 to register.
4 to 5 p.m. — Discussion for seniors on the health benefits of laughter, at Dogwood Estates, 2820 Wind River Lane. Free. Call 940-383-8600.
6 to 8 p.m. — Night hike along the Redbud Trail at Lewisville Lake Environmental Learning Area. For ages 5 and older. Cost is $7 per person, in addition to the regular gate fee of $5. Registration is required; call 972-219-3930 or e-mail firstname.lastname@example.org. Front gate is at Jones Street and North Kealy Avenue in Lewisville. Visit www.ias.unt.edu/llela.
Humble Beginnings group of Alcoholics Anonymous meets at 6 p.m. for discussion at Trinity Presbyterian Church, 2200 N. Bell Ave.