Family weekend fun: Horse Expo, Earth Day

The state's largest equine trade show features more than 700 trade booths throughout five State Fairgrounds buildings. Speakers will explain the basics of polo, establishing a horse pasture and other topics. Also wagon rides, consignment tack and clothing sale and PRCA rodeos. (8:30 a.m.-9:30 p.m. today-Sat.; 8:30 a.m.-5 p.m. Sun. $6-$10, $4-$12 for rodeo tickets. Warner Coliseum, State Fairgrounds, Judson Av. and Clough St., Falcon Heights. 952-356-2029. www.mnhorseexpo.org.)

Gather those crayon nubs so that they can be recycled into new ones at this event. Join in a day of science and art activities and educational exhibits. (11:30 a.m.-1 p.m. Sat. Free. Rambling River Park, Hwy. 50 at Division St., Farmington. 651-463-7111.)