2 sentences

1. 这西瓜吃起来嘎嘎甜。

   zhè xī​guā chī qi​lai gā​gā tián.

   This watermelon is super sweet.

   Source: Dong Chinese Dictionary

2. 那个滑稽的表演逗得孩子们嘎嘎大笑。

   nà​ge huá​jī de biǎo​yǎn dòu de hái​zi men gā​gā dà​xiào.

   That funny performance had the children cackling with laughter.

   Source: Dong Chinese Dictionary