Pick a flatter chip and add a dollop of guacamole (about 1 tablespoon)

Slice one olive in half and place one half with the cut side down on the guacamole. Slice the other half into 8 pieces and then place 4 legs on either side of the body on the chip.

I actually found it easier to cut about 6 slices for the legs (from 1/2 an olive), and then cut two of these slices in half and this still gave me 8 legs (of varying lengths) for each spider. I placed the shorter legs on either end of the body and the longer legs in the middle.

Serve and enjoy.