Sidonie Matsner Gruenberg (1881–1974) was a parenting expert, writer, and director of the Child Study Association of America.

[1][2] In her 1912 book Your Child Today and Tomorrow, Gruenberg popularized the idea of giving an allowance to children so they could understand how to spend it.

[3] Sidonie Gruenberg was born in Austria and educated in Germany and New York City.

[1] She married Benjamin Gruenberg, a biology teacher, in 1903, and had four children between 1907–1915: Herbert, Richard, Hilda, and Ernest.

"[3] On behalf of Macy's, she lectured at an exposition on "why children should have toys" in 1928.