Respawning gameobject not working c#

I have been having a problem with my Unity game in C#. What I am doing currently is having multiple parent gameobject prefabs (thingy 1, thingy 2, thingy 3) (with all their children: Scene 1, Scene 2, Scene 3) being chosen and spawned randomly at a set location using a list. What I want is every time the helicopter gameobject hits one of the childrens collider of the spawned parent gameobject a new gameobject is spawned. However, the colliders don't seem to be working. I have a box collider 2d and a rigidbody 2d attached to the helicopter. On the child gameobject I have just a 2d box collider attacked with the trigger box checked. Every time the helicopter hits the collider attached to the child gameobject, nothing happens! Please tell me what I am doing wrong. Thanks.

A picture of my prefab setting (my description was confusing, I know.):

A picture of the game running with nothing happening:

Code to Respawn (Just in case thats the problem):

 using UnityEngine;
 using System.Collections;
 
 public class SceneBehaviour : MonoBehaviour {
 
     private SpawnScene spawnScene;
 
     // Use this for initialization
     void Start () {
         spawnScene = GameObject.Find ("Scene Spawner").GetComponent <SpawnScene> ();
     }
 
     void OnTriggerEnter2D (Collider2D col) {
 
         if (col.gameObject.tag == "Helicopter") {
             spawnScene.SpawnTheScene ();
             Debug.Log ("The collider works");
         }
         
                                            
     }
 
     // Update is called once per frame
     void Update () {
     
     }
 }