Part of Bubba's "down time" includes playing "army" with his grandparents, Ma-Ma and Pa-Pa.  They fight bugs, aliens, predators and anything that's generally mean (and as seen in movies).  This is an excerpt from some of their missions:

The bugs are our enemy. We have  the Tanker bug, warrior bug, hopper bug, tiger bug, and the Brain bug.

Tiger Bug

Tanker Bug

Warrior Bug

Hopper Bug

Brain Bug