Earlier this year, at the 109th Annual American International Toy Fair, held at the Javits Convention Center as one of the culture’s most convincing cases for childlessness, a former investment banker named Jill Todd displayed “The Tuneables,” an interactive DVD series she had created through her company, the Music Intelligence Project , the New York Times reports. The daughter of two musicologists, Ms. Todd developed the project in conjunction with her parents as an instructional system in melody, rhythm and tone — the fundamentals of music leveraged as a means to enhance cognitive function. Nearby, but easily obscured by the acres of primary-color plastic, was a booth for a company called Fat Brain Toys, whose games and puzzles in logic and sequencing came with an impressive lineage, some of them designed by the celebrated inventor Ivan Moscovich, a Holocaust survivor. Walking into one of the three branches of Toys “R” Us now in the Bronx, you would find nothing from either of these ventures…

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