createCirclingChildren.cs

// Unity3d script to animate many circling objects
// Script creates the objects on startup, by instantiating a given object (create a prefab and assign it to the "obj" parameter in the inspector)
// Then moves them in a circle in the same way as circleChildren.cs
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class createCirclingChildren : MonoBehaviour {

    public int numberOfChildren = 1;
    public Object obj;
    public float speed = 1f;
    public float radius = 1f;

	// Use this for initialization
	void Start () {
            for (int i=0; i < numberOfChildren; i++)
                Instantiate(obj, transform);
	}
	
	// Update is called once per frame
	void Update () {
            for (int i=0; i < transform.childCount; i++)
                {
                Transform child = transform.GetChild(i);
                float angle = Time.time * speed + 2f*Mathf.PI*i/transform.childCount;
                child.localPosition = new Vector3(Mathf.Cos(angle), Mathf.Sin(angle), 0f) * radius;
                }		
	}
}