Contest Where Competitors Hop Inside Bags
Puzzle 10 of Words that Rhyme Piece of Cake Pack
Question is: Contest Where Competitors Hop Inside Bags
and the answer is: SACKRACE
Word Meaning:
SACK RACE — (games) A race in which competitors stand in sacks or similar items and try to be the first to jump to the finish line.
Definitions from Wiktionary.