Months 9-10

Beginning of voluntary release (9 months)¹

Voluntarily releases a cube into a large container by forearm supination (10 months)¹

Must have surface to release the toy against^{1, 46}

Awkward and crude release^{14, 26}

Active release through flinging by extension of the fingers, thumb, elbow, and wrist⁴⁶

Dropping food and toys from highchair is a favorite activity⁴⁶