0:00 A firefly’s light is one hundred percent efficient — not a single bit of its energy is wasted on heat.0:10 Last week, you might remember, we saw how our friend Leo turned a spooky shadow into a brand new game with the Midnight Shadow Wolf.0:23 Well, tonight’s adventure is about a different kind of light, and a girl named Lily who was just about to fall asleep… when she saw it.0:36 It started as a tiny dot.0:38 A wobbly, yellow-green glow, right outside her window.0:44 It bobbed up… and down… like a little boat on a wavy sea.0:49 Lily’s eyes went WIDE.0:51 It wasn’t a car.0:53 It wasn’t a star.0:55 It was… something else.0:57 She sat up in bed, pulling her blanket up to her chin.1:02 The light hovered for a moment.1:05 Then, ZING!1:06 It zipped behind the big rose bush in her garden.1:11 Gone.1:12 Lily held her breath.1:14 Was it a ghost?1:15 A tiny spaceship?1:17 A fallen bit of the moon?1:19 Hmmmm.1:20 She waited.1:21 One second.1:22 Two seconds.1:23 Three.1:24 Then, slowly, a little glow peeked out from behind a leaf.1:30 It wiggled, as if to say, “Yoo-hoo!1:33 I’m over here!” Lily couldn’t help it.1:37 A tiny giggle escaped.1:39 This wasn’t scary.1:41 This was… a game.1:42 “Okay,” she whispered to the window.1:46 “I’ll play.” She squeezed her eyes shut.1:50 “One… two… three…” She counted all the way to ten, just like in a proper game of hide-and-seek.1:59 When she opened her eyes… the light was gone again.2:04 She scanned the dark yard.2:07 Where did it go?2:08 Was it behind the bird bath?2:11 No.2:11 Under the porch swing?2:13 No.2:14 Then she saw it.2:15 A faint flicker, way at the back of the yard, by the big oak tree.2:22 It was so far away.2:24 But it pulsed, gentle and slow.2:27 Come find me… it seemed to say.2:30 This was the bravest part.2:32 Getting out of her warm, safe bed.2:36 Her feet made no sound on the soft rug.2:40 She crept to the window, pressing her nose against the cool glass.2:46 The little light blinked again from behind the tree trunk.2:52 It looked a little lonely out there all by itself.2:57 And that’s when the most amazing thing happened.3:01 As she watched, another light blinked on right next to it.3:07 And another.3:08 And another!3:09 Suddenly, the whole back of the yard was filled with them.3:15 Dozens, then HUNDREDS of tiny, wobbly, yellow-green lights, all rising from the grass.3:24 They weren’t a spooky monster at all.3:27 They were fireflies.3:29 A whole family of them, having a party in the dark.3:34 The first little light, her hide-and-seek partner, danced out from behind the tree and joined the others.3:45 They swirled and swooped, painting glowing pictures in the night air.3:51 It was a secret light show, just for her.3:55 Lily smiled.3:57 The thing that seemed a little scary at first was actually something beautiful.4:04 She wasn’t frightened anymore.4:07 She felt… special.4:09 Like she’d been let in on a wonderful secret.4:14 She tiptoed back to her bed, snuggled under the covers, and turned to watch the silent, sparkling dance outside her window.4:26 The wobbly lights were like friendly little night-lights, blinking goodnight, goodnight, goodnight.4:35 And with a yard full of tiny, dancing friends, Lily closed her eyes and drifted off to sleep.