  A small number of M-theory branes as giant gravitons in the M-theory sector
of LLM geometry is studied as a probe. The abelian way shows that the low
energy effective action for M-theory brane is exactly the 2d electron subject
to a vertical magnetic field. We also briefly discuss the microscopic
description of M2-brane giant graviton in this geometry, in the language of a
combination of D0-branes as fuzzy 2-spheres. Then we go to the well-established
Noncommutative Chern-Simons theory description. After quantization, well
behaved Fractional Quantum Hall Effect is demonstrated. This goes beyond the
original LLM description and should be some indication of novel geometry.
