Annuity Immediate Quote

In researching reasons to purchase anuities, no one has on their list of reasons, to hide money so it does not appear on the FAFSA college form. The less money you have the greater the possibility of you receiving more aid from a college for your child. An annuity is one item that does not need to be declared on the FAFSA form. Has anyone else done this and what were the results from the colleges as far as granting aid? Also what type of annuity(s) did you purchase?