A ball is more curious than a chair. A chair usually stays put, but a ball gets bored of where it is and rolls somewhere else.
Water is more curious still than a ball. Like a ball, it doesn’t let friction slow it down so much, and it’s also very curious about finding spots closer to the center of the earth. It also evaporates, becomes a cloud, and then explores other places.
I don’t count air as curious because even though it tends to go everywhere, it doesn’t really favor one place over another. It’s expansive but not curious. Curiosity is about exploring new situations, while still maintaining some structural integrity. Do you agree with me about air not being curious?
A cat is more curious than water, even.