One by one, their projects exploded in sharp little fiery bursts, just as they were supposed to.

Marci took a deep breath as Caleb's exploded beside her, and then she quickly dumped in the last grains of powder...

Her project exploded in a rainbow of colored flame and whistling sound before sparkling as it faded to ash and smoke.

At the front of the class, Mx. Thorn cleared their throat.

"A note in the margin," Marci said quickly. "I just wanted to see..."

"I understand," Mx. Thorn replied, smiling. "I had that copy when I was a student."