Later, JoJo told Katie, “Let’s start a new volcano, and this time we will be fair. We will each do our share.”

Katie did the last step: She poured the baking soda into the bottle.

When it mixed with the vinegar —

KABOOM!

The lava poured out. “Wow!” shouted everyone. “Awesome!”

“High five!” said Katie and Pedro and JoJo.

After school, Katie said, “Let’s be volcanoes all the way home.”

Boy, did they yell!

“Kaboom!”

“Kaboom!”

“KABOOOOOM!”