This is a report on Home Activities for Toddlers and their Families (HATAF), an ongoing Israeli intervention program designed to provide home-based, educationally enriching activities for disadvantaged preschoolers and to enable mothers to participate in enhancing the intellectual development of their children. The report describes two sample pilot projects that were undertaken as part of HATAF's tryout stage. Pilot one consisted of two stages. The first stage provided instruction for 1-year-old children of Asian and African immigrant families. Trained paraprofessional aides periodically visited each family in the sample to deliver and explain pre-planned written materials with appropriate play activities to the mothers. The second stage sought to obtain more information on the mothers, assigned a more active role to the aides, and provided activities that were more adaptable to individual children's developmental levels. Pilot II, which was based on the results of the first pilot, focused more systematically on the mother-child intellectual process and on the manipulation of selected variables to influence intellectual growth. The report describes the objectives, activities, problems, changes, and outcomes of each of the pilot projects, providing a detailed description of how the program was actually implemented and evaluated in the field. (Author/MJL)