10 a.m.: Take Off Pounds Sensibly (TOPS) open house, Centenary United Methodist Church, Fourth and Elm streets, 843-2036.
10:30 a.m.-11 a.m.: Storytime for 2-year-olds and an accompanying adult, Lawrence Public Library, 707 Vt., 843-3833, Ext. 117. Registration required.
10:30 a.m.-11 a.m.: Storytime for children 3 years and older, Lawrence Public Library, 707 Vt., 843-3833, Ext. 117.
10 a.m.-8 p.m.: Friends of the Lawrence Public Library annual book sale, Lawrence Public Library, 707 Vt.
Noon: PEO Chapter FZ meeting, home of Mona Bell.
3 p.m.-7 p.m.: Tenants to Homeowners Inc. open houses, 1713, 1801 and 1825 Atherton Court, 842-5494.
5:30 p.m.: "Decoding Darkness: The Search for the Genetic Causes of Alzheimer's Disease," lecture by Rudy Tanzi of Harvard University, Kansas Union, Alderson Auditorium, 864-3591.
All day: All-University Open House, Kansas University, 864-2341.
7:30 a.m.: Lawrence Farmers Market, Vermont Street between 10th and 11th streets, 842-3883 or 838-4726.
9 a.m.-10 a.m.: Cohousing site tour, Delaware Street Commons, 1208 Del. Business meeting, 10 a.m.-noon.
10 a.m.-noon: Lawrence-Douglas County Health Department walk-in immunization clinic, Health Department, 200 Maine, 843-0721.
10 a.m.-2 p.m.: Communitywide Yard Sale to benefit Homeless Concerns, First Regular Missionary Baptist Church, 1646 Vt., 843-5811.