Nearly 200 Montgomery County youngsters enrolled in programs operated by the Montgomery Child Day Care Association are taking day trips to summer camp through a grant from the George Preston Marshall Foundation.

The campers, who are 6 to 12 years old, travel by bus to Brighton Woods, the Girl Scout camp near Brighton Dam, and return and the same day. Most of the children come from homes where both parents work and without the camp would continue all year around in a schoolroom atmosphere.

At the camp, the emphasis is on nature activities, with nature arts and crafts, camping skills camp cooking, music for the outdoors and non-competitive games offered.

This is the third year the Marshall Foundation has given $3,500 grants to the association for its summer camp program. The donation pays for about half of the cost each summer.

The association, which operates year-round in Kensington, also offers an early childhood curriculum for pre-school and kindergarten age children from families of all income levels. Through contracts with the County Department of Social Services, fees can be arranged on a sliding scale according to family size and income.

Information on day care admission is available by calling 946-1213.