[sgreco]

The answer is in the rule book, but I'll give it to you to save time...

R<92> specifies all materials legal on the minibot.

AA. Says magnets are legal.

<R92> The following items are the only permitted materials for use on the MINIBOTS:
A. TETRIX components that are not
in violation of any other rules,
(Tetrix components are listed in
Approved Tetrix Parts at
www.usfirst.org/frc/competitionma
nual),
B. no more than two motors (PN
W739083/W739023) and an
unlimited number of Tetrix
servos),
C. no more than one 12V
rechargeable NiMH battery pack
identical to those supplied in the
FTC kit of parts (PN W739057)
except the 20A fuse may be
replaced with an equivalent type
of lower amperage,
D. No more than one HiTechnic DC
motor controllers,
E. No more than one NXT controller
with the Bluetooth functionality
disabled,
F. Polycarbonate,
G. Polycarbonate glue,
H. Raw welding rod, aluminum
sheet, 90° angle, u-channel, tube,
bar, that is not sold in preperforated or pre-punched form.
I. rivets,
J. non-metallic rope or cord,
K. wire nuts, solder, and crimps,
L. cable ties,
M. limit switches,
N. no more than two common
household light switches,
O. electrical hookup wire,
P. non-slip pad,
Q. PVC or CPVC pipe and fittings,
R. PVC cement or cleaner,
S. Mechanical fasteners (e.g.
screws, bolts, etc),
T. Loctite or similar thread-locking
product,
U. Rubber bands,
V. Surgical tubing,
W. Electrical tape and shrink tubing,
X. PWM extension cables,
Y. Universal security clips to hold
the PWM connectors together,
Z. Hook and loop fastener (may not
be used as tape),
AA. Magnets,
BB. NXT compatible sensors and
related connectors/cables,
CC. Grease, and
DD. Non-functional decorations