<prompt> Bidextrous grasp appears at:3 months4 months5 months6 months  <response>: 16 weeks - Tries to reach cube, but overshoots and misses. 20 weeks- Able to grasp voluntarily, Bidextrous approach 24 weeks- More mature grasp, Drops one cube when another is given. 28 weeks- Unidextrous approach, Bangs cube on table. Transfers. Retains one when another is given. Ref: Illingwohs The development of young child and infant - page 278. 