Kudos to the toymakers who add a volume control switch on their battery operated "talking, roaring, squealing, etc." toys. For those that don't have that feature, a piece of duct tape securely sealed over the speaker holes will lower the decibels to a level that you can tolerate yet still be audible enough for the child who's playing with the toy.
I use duct tape because it is very difficult to remove yet is woven in a way that lets some of the sound out. Smaller children will need supervision if they are curious ones who try to take things apart and put foreign objects in their mouths, but then they have to be watched closely anyway. At least the noise level won't add to the mayhem!
By Sandy from Elon, NC