[EricH]

Here's one I've seen used:

2-4 BLT-type bots (VEX size)--maybe have some extensions to help herding and/or some bump switches for a temporary disable. This is simple robots here.
A bunch of golf balls and some floor holes (try the local sporting goods store, they might even have a full set--the one I've seen was a "putter pool" set).
FLL table, empty and on the ground (Could use something like a VRC or FTC field with just the border, though).

Place golf balls in the center, two minutes to herd as many as possible into one set of pockets (yours, preferably--but there's a LOT of variations possible with how to run the game).