"about math, research papers, science"

"认真护肤的男生"

"Ninja with a sword and shield"

"Spaceship flying through an asteroid belt"

"Ghost ship on the high seas"

"Mermaid with a treasure map"

"Astronaut with a flag on the moon"

"Alien with a translator device"

"Alien with a laser gun"

"Pirate captain with a hook hand"

"Ninja with a grappling hook"

"Pirate treasure cave"

"Fairy princess with wings"

"Haunted house with ghosts"

"Mermaid lagoon"