one object triggers another ( neither object the player)

I have an object a child of the player called “crosshair” and tagged as such. the object is in front of the player so when THAT hits the trigger zone( not the player) I want the animation on the game object called and tagged “dancertest” to play. But I can’t get it to work and can’t understand why. If I substitute “player” in the script like so at at he end… if(other.tag == “Player”) instead of if(other.tag == “crosshair”) the player then triggers the animation I want. So what am I missing here? Everything seems to be in order or substituting that one word wouldn’t work either. This object called “crosshair” has a box collider on it, name and tag match script

using UnityEngine;
using System.Collections;

public class InAim : MonoBehaviour {
	GameObject crosshair;
	GameObject dancertest;
	Animation animation;

	void Start () {
		crosshair = GameObject.FindWithTag("crosshair");
		dancertest = GameObject.FindWithTag("dancertest");
		//animation = GameObject.GetComponent.("dancertest")<Animation>();

		void OnTriggerEnter (Collider other) {
			if(other.tag == "crosshair")

Which of the colliders involved are and are not triggers?

When I’ve had both trigger and non-trigger colliders that I want the same object to trigger a response to, I’ve had to give that object double the colliders… One trigger copy and one non-trigger copy, as the trigger colliders only trigger other trigger colliders and vice versa.

I have no idea if that’s your issue or not, but if it is, it should be easy enough to fix.