Supplies:  1-4 bead sheets or old sleeping bags.

Divide the group into 1-4 teams and give each team a bedsheet.  Have one half of each team go to the opposite side of the room for a relay race.  Hand a bedsheet to the first person in line on one side of the room and when you say go, the first person must drop to the floor on the bedsheet, roll themselves up into a "caterpillar" and then "inchworm" crawl to their teammates across the room.  There they must unroll (the receiving team may assist!) then the next person in line rolls up and inches back to the other side.  Continue the relay until each person has crossed to the other side.  You can also use old sleeping bags instead of the sheet.