Heavy Balls Are Rolled to Knock Down Pins
This page is the CodyCross answer for the clue below from Amusement Park, Group 216, Puzzle 2 (Fireworks Show).
Question is: Heavy Balls Are Rolled to Knock Down Pins
and the answer is: BOWLING
Word Meaning:
BOWLING — present participle and gerund of bowl
Definitions from Wiktionary.