tambourines

"My grandfather is a birdwatcher and can identify almost any bird by its song. "

"She enthusiastically volunteered to help with the school bake sale. "

"The violinist was a master of her instrument."

"The percussion of the raindrops against the windowpane created a soothing rhythm. "

"The children played a lively rhythm using tambourines during their music class. "

"The dictionary's definition of "optimistic" explains its meaning as a positive outlook. "

"The project consists of three main parts. "

"This week's math test is featuring fractions, so make sure you study them carefully. "

"The library offered an extension on the due date for the overdue books. "

"The violinist was a master of her instrument."

"The child bounced the ball rhythmically, enjoying the steady beat. "

"the performance of an undertaking or a duty"