This Mother’s Day, consider giving moms-to-be BabyPlus, a prenatal education system that introduces patterns of sound in the language of the maternal heartbeat. The 16-week curriculum is used for one hour twice a day, teaching the child to distinguish between his or her mother’s heartbeat and the sounds produced by BabyPlus. As the pregnancy progresses, the BabyPlus lessons advance slightly, thus strengthening learning ability during the developmental period when the advantages will be most significant for a child. (www.babyplus.com)   JANE SHIOMI