They help the oral-sensory foundation — chewing, jaw strength, mouth awareness, and reducing mouthing of unsafe objects — which supports feeding and can support speech work. They are not a magic speech switch. Use them as part of a therapist-guided plan: correct size and firmness, supervised use, and sterilise with warm water after each use. Parents here have found them most useful for children who mouth everything or don’t chew food properly.
Disclaimer: This is general information shared for parent awareness, not medical advice. Every child is different — please confirm decisions with your child's doctor or a qualified, RCI-registered professional.