C# in Unity, SetActive several gameObjects from player entering trigger area

Question

Brand new to C# and Unity.Please be nice I've been at this all night. Every tutorial I poor through says changing an object from invisible to visible is as simple as setting the game object to on. However Unity gives me an error when I declare a game object in this script. The objective is, when the trigger is entered, several game objects called 'spawn' will become visible.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class collider : MonoBehaviour 
{

    public gameObject Spawn; // I get error On this line that type is expected, 
                             //not property. It wants a Transform>
    private Rigidbody rb;
    void Start () 
    {
        rb = GetComponent<Rigidbody>();

    }



    void OnTriggerEnter(BoxCollider other)
    {


        if (other.gameObject.CompareTag("Player"))
        {
            Spawn.SetActive(true);

        }
    }

}

Answer 1

gameObject isn't a type, but GameObject is.

Get rid of public gameObject Spawn; and use public GameObject Spawn; to declare a GameObject property called Spawn