Ya it is, I bought mine on amazon. I has seen some people using them when I was in the hospital and they seemed to help so I got one and I love it! I got a pack of three in case it breaks or I want it bigger. Its a Tangle Junior... The regular ones are REALLY big. You can get metallic ones, just plastic ones, or textured ones. Mine are textured, I like the different feelings on it, it sort of calms me down. Like I said,I got mine from amazon.com , but you can sometimes get them on other websites or in toy stores
Good luck