"Would you kindly tell me what's going on?" Edison asked.
"I told you before, we're on a scientific adventure," Courtney answered. "We're given riddles to figure out -- but yours didn't make any sense, until now."
"Think about it," Collin said, directing his words to Mr. Edison. " 'The Dark Knight puts the Wizard to the test.' The dark is a challenge to you. You want to make dark things brighter -- so that's a test of your creativity. 'What survives must be the best.' Heck, you said those words yourself. You try and try and try, and finally you succeed -- finding the thing that works the best."
Collin figured he might enjoy spending time with Thomas Edison. The man was a genius, and he understood what it was like to be a daydreamer and to get in trouble at school. He'd told Collin things that sounded interesting ... things he'd like to know more about. But Collin realized he had to get home.
"Do you see the triangle anywhere?" Collin asked his sister and Morgan, keeping his voice low so Mr. Edison couldn't hear.
Morgan and Courtney shook their heads.
"If we've figured out the answer, the triangle should be around here somewhere. We've got to find it before it disappears," Collin whispered, then faced his newfound friend.
"Thank you for making science sound interesting, Al," Collin said. "Who knows, when I get home, I just might decide to learn more about it."
"You're leaving? Does this mean I can have my lab and my peace and quiet back?" Edison asked, picking up the filament from the broken electric lamp.
"Yeah. We're getting out of your hair," Collin said, sticking his hand out, hoping Mr. Edison would shake it.
Edison shook Collin's hand briefly, then handed him the filament. "Take this and remember that every failure is a success, as long as you persevere."
Collin grabbed the filament and stuffed it into his pocket, realizing that time was flying by much too quickly.
"Thanks," Collin yelled, then ran down the stairs behind Courtney and Morgan.
"Look," Morgan said, standing at the foot of the stairs. "There's a light in the closet."
Collin looked back up toward the laboratory. Edison hadn't followed; he hadn't watched them leave. Probably a good thing, Collin figured. History could change if Edison saw them vanish in a triangle of light. Who knows, the man might decide to spend all his time trying to figure out some scientific reason how and why they'd disappeared, when he had more important things to invent -- like the motion picture camera.