Montessori Knobbed Cylinders 

This is one of the first activities in sensorial in a Montessori classroom. The child is encouraged to remove each cylinder one by one, and then match each one back into the correct socket. Children will acquire many different skills by mastering the knobbed cylinder activity, for example one-to-one correspondence, crossing the mid-line, development of the pincer grip, alignment and judgment, fine motor coordination, and hand-eye coordination.