My son chews. He chews his shirts, his sleeves, his fingers, his toys, his straws, etc. It has gotten worse lately so I decided to get him some chewy things that aren't for babies. (he is almost 5) I hope it won't get to the point where he has to take them to school, but for now these are working well at home. And they seem to give him some of the sensory input he needs too. I got this 5 pack because it was a terrific value and I didn't know what kind would work best. He loves the blue "X" chewy stick the best. He tried the others, but didn't stick with them long. He did figure out the tubes (not the X style) whistle, and we were in the car on a long car ride. It wasn't so loud it was annoying and I figured the blowing is also sensory so why make a big deal out of it - maybe he needs that kind of input as well. The X style one has several textures, is harder, and he has 2 longer sides to hold onto/twist/bend, etc. He even tried to put 2 sides in his mouth at once (which I am sure is a choking hazard) and I had to stop him. My stars may not be great - because of the categories they ask for - educational and fun (this is not that type of toy), but this is a great product and we need it.