Animating Children in gameobject

Unity Engine
1

Hello everyone i have an issue with a checkpoint object i want to make. Basically its one parent that has the animator and scrip attached and 3 more gameobjects as children that i want to enable in order.
First the idle checkpoint animation should play then on trigger enter open the text prefab and animation that the checkpoint is reached.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using TMPro;

public class CheckPoints : MonoBehaviour
{
    public bool checkPointReached;
    Animator anim;
    public CheckPointManager CM;
    private CameraFollow camFollow;
    private CameraTransition camTr;
    public float distance;
    GameObject flag;
    GameObject text;
    GameObject checkpoint;

    void Start()
    {
        anim = GetComponent<Animator>();
        CM = GameObject.FindGameObjectWithTag("CM").GetComponent<CheckPointManager>(); // for player positioning
        camFollow = GameObject.FindGameObjectWithTag("MainCamera").GetComponent<CameraFollow>(); // for camera positioning
        flag = transform.GetChild(0).gameObject;
        text = transform.GetChild(2).gameObject;
        checkpoint = transform.GetChild(1).gameObject;

        text.SetActive(false);
        flag.SetActive(false);
        anim.Play("checkPointIdle");
    }

    private void OnTriggerEnter2D(Collider2D other)
    {
        if (other.CompareTag("Player"))
        {
            checkPointReached = true; // reached checkpoint
            CM.currentCheckPoint = gameObject; // set current object as latest checkpoint
            Debug.Log("Activated checkpoint" + transform.position);
            Debug.Log("Checkpoint " + CM.currentCheckPoint);

            CM.boundsMax = camFollow.boundsMax;
            CM.boundsMin = camFollow.boundsMin;

            Debug.Log("Camera Bounds are :" + ("min") + camFollow.boundsMin + ("max") + camFollow.boundsMax);
            text.SetActive(true);
            flag.SetActive(true);
            anim.Play("CheckPointEnabled");

        }

    }


    public void LoopFlag()
    {
        anim.Play("FlagLoop");
    }

}
2

my issue is that animations wont work! originaly i had all of the transitions in the same object with just the text prefab getting enabled but i had issues with positioning the objects ( the idle flies around while the checked animation should appear on the ground) and the flag appeared mid air so i thought i would make them all different game objects position them as i need and animate them, but im having trouble. do i need animation controllers on all gameobjects?

the loop flag is an event trigger that right now wont work on the flag object!