May is exceptional children's month, and special education schools in the District are holding open houses today and tomorrow and special events throughout the month.

An on-going campaign called Child Find, designed to locate children or youths with handicaps who are not in school or who are not being appropriately served, also beings this month. The division of special education of the D.C. Public Schools is initiating the program to search for youths who are blind, deaf, physically handicapped, emotionally disturbed, mentally retarded or learning disabled.

People who know of such children or those who would like a representative of the school placement office or Child Find to speak to community groups can call the specail education division at 724-4022, and ask for Child Find.

Among the month's activities is a Very Special Arts Festivel for disabled persons of all ages. It will be May 25 and 26 at Gallaudet College, 7th Street and Florida Avenue NE, and will offer dance performances, drama, arts and crafts, touch toys for the blind and workshops. For information on how to participate, call Jerri Reddick at 673-7635.

Open houses going on today and tomorrow from 9:30 a.m. to 3 p.m. at the following schools for exceptional children: Grant School, which serves children with hearing impairments, 21st and G Streets NW; Bundy Alternative School, 429 O St. NW., and Lovejoy Alternative School, 12th and D Streets NE, which serve learning disabled and emotionally disturbed children.

Open houses are also in progress today and tomorrow at the following schools for mentally retarded children: Birney Annex, Martin Luther King Avenue and Summer Road SE; Lenox Annex, 4th and M Streets SE; Military Road School, 14th Street and Missouri Avenue NW; Mamie D. Lee School, Hamilton Street and Fort Totten Drive NE; Richardson Annex, 53rd and Blaine Streets NE. and Webster School, 10th and H Streets NW.

There also are open houses at the Morse/Bundy School, 429 o St. NW, for problem disturbed children, and Jackson School, 30th and R Streets NW, which serves visually impaired students.

A demonstration of therapeutic horseback riding by students with various types of disabilities will be given Friday from 9:30 to 11:30 a.m., at Rock Creek Park Stables, Military and Glover Roads NW.