stop the objects for a while

Hello

I have rolling stones on my scene, the stones are throwing from the cannon in small part of time.

I want to stop the stones and throwing it for a while when Player drag the the lever on, how could I do it? I tried the function: Time.timeScale = 0; but it stops all the game, I want only stop movement of the stones and throwing from the cannon, how could I do that in C#?

I know that i have to use "Is Kinematic" on each stone Rigidbody instantiate, how can i do? It's cannon script:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class stonelauncher : MonoBehaviour {
     private float number = 10;
     public float time = 2.7f;
     public Rigidbody stonePrefab; 
     public Transform stonePosition;
 
     void Start ()     {
         StartCoroutine (Spawn_stone());
         }    
         
     IEnumerator Spawn_stone() {
         for(var i = 0; i < number ; i = i + 0) {
             Rigidbody stoneInstance;
             stoneInstance =    Instantiate (stonePrefab, stonePosition.position, stonePosition.rotation) as Rigidbody;
             stoneInstance.AddForce (stonePosition.right * 7, ForceMode.Impulse);
             yield return new WaitForSeconds (time);
             
         }
         
     }
         }    

Thanks for all advices and sorry for my poor english.