It's a Secret

Summary
Ana tries to keep 9-Volt's birthday surprise a secret.

Plot
9-Volt introduces Ana and says that it's his birthday and his surprise is going to be a secret. Ana thinks the surprise may be a new pair of soccer shoes, a new skateboard, or a ride on a rollercoaster. While having lunch, 9-Volt tries to keep Ana from telling him the surprise and spoiling it. 9-Volt then hides under the bed, while Ana tells Ashley about the surprise. However, Ashley becomes invisible when 9-Volt jumps out from under the bed. After 9-Volt leaves, Ashley comes back to normal and Ana tries to tell Ashley again, but 9-Volt comes back again, prompting Ashley to make herself invisible again. 9-Volt leaves again, and Ashley returns back to normal, this time having white hair while snapping at Ana to tell her. Meanwhile, 9-Volt and 18-Volt are playing with each other, but Ana appears and gets them to the surprise, but 9-Volt tells Ana to keep it secret. Meanwhile, on a drive in a car, 9-Volt asks Ana if she's excited for the surprise, to which Ana thinks she is excited. 9-Volt says the surprise may have ice cream, and 9-Volt is having chocolate, while Ana thinks she is having strawberry. 9-Volt guesses that the surprise will be an ancient pyramid, but Ana says it's much older. 9-Volt guesses that the surprise will be a ride on an African Elephant, but Ana says it's much bigger. 9-Volt guesses that the surprise will be a ride on a scary ghost train, but Ana says it's much scarier. Meanwhile, Ana tells 9-Volt that he can look now, and 9-Volt uncovers his eyes and discovers that his birthday surprise is a dinosaur museum.