Here's some info about the pincer grip that i found online:
Using the thumb and forefinger to pick up things like peas or Cheerios — a.k.a. the pincer grasp — is a tiny, yet mighty, movement. For early childhood experts, the pincer grasp marks a momentous developmental milestone, showing that a baby's brain, muscles, and nervous system are becoming highly synchronized and capable of increasingly sophisticated coordination.
"The pincer grasp will eventually allow a child to button a shirt, use a pencil, play the violin," says Tanya Remer Altmann, M.D., a clinical instructor in pediatrics at UCLA. "But [even] when it first emerges, typically between 8 and 12 months, it opens up a whole new world for a baby to explore." With thumb and forefinger working together, blocks can be stacked, not just whacked; bits of food can be picked up and eaten without help; and (the bad news) coins can be pried off the floor and swallowed." http://wondertime.go.com/learning/article/get-a-grip-pincer-grasp.html
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