Farmers Market, 6:30 a.m.-10:30 a.m., 1000 block of Vermont Street.
"Prairie Critters," the Grassland Heritage Foundation brings their Rolling Prairie Learning Lab, 10 a.m.-1 p.m., grassy area behind the Lawrence Public Library, 707 Vt., 843-3833, ext. 117.
Bookworms Unite!, book club for 8-12 year olds, 2:30 p.m.-3:30 p.m., Lawrence Public Library, 707 Vt., 843-3833, ext. 117. Pre-registration requested for 7-week session.
Harry Potter Lock-in, for 11-18 year olds, 5 p.m.-9 a.m., Children's Room, Lawrence Public Library, 707 Vt., 843-3833, ext. 121. Signed permission slip required; pick it up in the Zone or in the Children's Room. Space limited.
Ice cream social, fundraiser for Big Springs Community Center Association to refurbish the old Big Springs schoolhouse, 6 p.m.-8 p.m., Big Springs Community Center, Highway 40, 887-6374.
Bloomington Sesquicentennial Celebration: 1855 to 2005, 7 p.m., Clinton Lake Museum located in Bloomington Park near Clinton.
Sunset at The Point, 7 p.m.-9 p.m., South Lawrence Trafficway to Clinton Parkway exit to Clinton Dam, follow signs, www.sunflower.com/~thepoint.