We bought the towels for a friend of our daughter (4 years). Our daughter played with it already for a year in a big way and also our son (1.5 years) was fun to hide among them or throwing them in the air.
They are also often used to "disguise", as tail, bracelet, scarf, etc.
We parents train ourselves with the towels every once in juggling. Highly recommended to be of concentrative work (z. B. PC) once briefly to unwind / loosen.