“What gets wetter and wetter the more it dries?” is an example of a fun riddle or brainteaser. The answer to this riddle is: a towel.
The explanation of this brainteaser is rather simple: when a towel is used to dry a person or object, the towel absorbs moisture, becoming wetter and wetter. The person or object, on the other hand, becomes drier as the towel absorbs the moisture. An alternative phrasing of this riddle is, “The more it dries, the wetter it becomes.”
Many easy, kid-friendly brainteasers and their solutions can be found in books and online, including on Funology.com and BrainDen.com.