Two infant stimulation programs - for Down's Syndrome and hearing impaired children - in Montgomery County, Maryland, are described. Referral, initial assessment, development of individualized education program, and use of learning activities with the Down's infants are discussed along with intervention rationale, parent role, and child development stages (gross motor, fine motor, communication, social and self help). The hearing impaired program description focuses on accompanying handicaps, conductive and sensorineural losses, audiological evaluation techniques, hearing aid selection and use, auditory training, and specific skill development. (CL)