The boys were sent outside because of their boisterous behaviour.
Advanced English Dictionary
+adjective (of people, animals or behaviour) noisy and full of life and energy: It was a challenge, keeping ten boisterous seven-year-olds amused. + The children and the dogs raced out of the house to give me a boisterous welcome. boisterously adverb
Random quote: Never apologize for showing feelings. When you do so, you apologize for the truth.: Benjamin Disraeli