"about math, research papers, science"

"Dead scary man"

"哈雷摩托车"

"水井里有一只青蛙"

"Mermaid with a shell necklace"

"Mermaid with a treasure map"

"Spaceship docking at a station"

"Ninja with a mask"

"Viking with a battle axe"

"Mermaid with coral"

"Astronaut exploring an asteroid"

"Cyber wolf"

"Fairy tale carriage"

"Haunted mansion on a hill"

"海绵宝宝在吃饭"

"Fairy on a mushroom"