NATIONAL TRAIN DAY

Ride the rails this weekend in observance of National Train Day. Union Depot hosts rail-themed activities and amusements for all ages. Rail cars will be open and Choo Choo Bob and Cannonball Paul will perform throughout the day. Guests can pick up a "Train Day ticket" and get it stamped at different stations in exchange for a T-shirt. (11 a.m.-4 p.m. Sat. Union Depot, 214 E. 4th St., St. Paul. 651-225-3923. www.uniondepot.org/trainday.) Amtrak and other passenger trains are featured on layouts at the Twin City Model Railroad Museum. Historic buses give free round-trip rides between the museum, Jackson Street Roundhouse, Union Depot and James J. Hill House; riders can view train exhibits at each stop. (10 a.m.-5 p.m. Sat. $8. Twin City Model Railroad Museum, Bandana Square, 1021 E. Bandana Blvd., St. Paul. 651-647-9628. www.tcmrm.org.)

MOTHER'S DAY WEEKEND ON THE FARM

Help plant seeds and harvest the first spring greens. Meet new animals and other activities. (10 a.m.-5 p.m. Sat.; noon-5 p.m. Sun. $6-$9, mothers admitted free when accompanied by a child. Oliver Kelley Farm, 15788 Kelley Farm Rd., Elk River. 763-441-6896. www.mnhs.org.)

MELISSA WALKER