A seven-foot dollhouse full of baby dolls and hands-on working miniature train displays are part of the St. Clement's Island -- Potomac River Museum's 17th annual Doll and Train Exhibit. Head for the Little Red Schoolhouse on the museum's grounds for your fill of trains and dolls, or stroll through the museum proper for an abundance of teddy bears. An informative exhibit about President Theodore Roosevelt celebrates the teddy bear's 100th anniversary. Children will be offered a special treat if they can correctly guess the number of bears on display. Noon-4 p.m. Wednesdays-Sundays, starting Sunday through Jan. 4. St. Clement's Island-Potomac River Museum, 38370 Point Breeze Rd., Colton's Point. $1. 301-769-2222.


Leonardtown's Christmas on the Square and Tree Lighting includes live music and entertainment, horse-drawn carriage rides, sleigh rides, hay rides, pony rides, Christmas carols and choirs, juggling, ballet performances, a bagpiper, Mrs. Claus, Santa's Parade and Santa lighting the Christmas tree. Frosty the Snowman and the Christmas Bear also will make appearances. Enjoy holiday crafts, face painting, gingerbread house contest displays, food, pictures with Santa and more. Free shuttle service available from the College of Southern Maryland Leonardtown Campus to the Leonardtown Square. 5-9 p.m. tomorrow; rain date Saturday. Leonardtown Square, Hollywood Road and Fenwick Street. Free. 301-475-9791.


See 100 decorated trees and buy chocolates, baked goods, gifts and greens to benefit Hospice of Charles County. Special events include a Monte Carlo gala with dinner, open bar, live music, gaming and an auction 7 p.m.-midnight Saturday ($70); breakfast with Santa 9-10:30 a.m. Saturday and Sunday ($12); and an evening at the Improv, with comedians from Washington Improv and a silent auction 5:30 p.m. Sunday ($40). Reservations required for special events. Tree viewing, 10:30 a.m.-4 p.m. Saturday-Monday. Jaycees Community Center, 3092 Crain Hwy., Waldorf. $5; seniors, $3; children 6-12, $1; younger than 5, free. 301-609-8733.

Leonardtown's Christmas on the Square and Tree Lighting festivities promise not only private consultations with Santa but also live music, rides, crafts, food and Frosty the Snowman.