If they can make any kind of a rolling robot and program it to move
forward and stop, they can complete three missions: push a ball into
the reservoir, trigger the storm, and push a minifig to the green
mountain. With those plus the three gimme levees (assuming the storm
doesn't clobber one), that's 5+15+10+15=45 points right there. Maybe
they'd find that fact encouraging.
And the penalties are taken from the levees in Base, so that score
holds even if their robot doesn't drive backwards back to Base and is
retrieved by hand each time.
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