Robert:

Be aware that the two little batteries
a) don't give much OOOMPH so 62 gms is
abaout what it can carry
b) cost about $4 EACH - at least at RS

And these little critters won't stand up
to much abuse. A five year old would
kill one in a New York Minute.

Did you hit the Hexbug.com site and see
their videos? They've got
three or four
other bots.