Perfect, scientific silence 🎵 filled the Cardboard Lab. Eight-year-old Clara wore a sparkling-clean lab coat that was two sizes too big, with a pencil tucked behind her ear. She stared into a test tube made from an old strawberry jam jar. She was just writing down a very important math problem in her Research Journal when suddenly…

“BZZZZZT! BAAAM! RUN FOR YOUR LIVES, HERE COMES MISTER LIGHTNING 🎵!”

The door to the treehouse burst open with a bang 🎵. Six-year-old Leo crashed inside. A red towel cape flapped from his shoulders, pink swimming goggles covered his eyes, and he squeezed two giant, blown-up balloons in his hands. But it wasn’t the cape or the goggles that caught Clara’s attention.

It was Leo’s hair.

Every single hair on the boy’s head stood straight up, making him look like a giant, spiky hedgehog. Leo laughed wildly 🎵 as he rubbed the balloons against his 🎵 thick woolen sweater.

Copernicus, the pet chameleon living in a glass tank on the shelf, rolled one eye 🎵. His scales instantly turned a warning shade of yellow and black 🎵.

“Leo!” Clara sighed heavily, putting down her notebook. “What are you doing in my sterile zone this time?”

“I’m charging up my superpower!” yelled Leo, running up to the corkboard. “Watch this!”

The boy pressed a balloon against the wall and let go. The balloon… just stayed there 🎵. It was as if it had been stuck on with invisible glue.

“Ha! I defeated gravity!” Leo shouted in triumph. Then, he poked the metal lamp on Clara’s desk with his finger.

“ZAP!”

A tiny blue spark 🎵 jumped from Leo’s finger. The boy squeaked 🎵 and jumped back.

“Ouch! This superpower bites!”

Clara adjusted her safety goggles on her forehead and walked over to her brother, looking like a very serious professor.

“According to my calculations, Leo, you are no Mister Lightning, and the balloon didn’t defeat gravity. You are simply a victim of static electricity.”

She walked over to the large blackboard and quickly drew a circle with 🎵 pluses and minuses inside it.