@Jean Thanks for the comprehensive answer - but I think your solution is too complex for my skill level. I had a look at SET TAG, but this doesn't help unfortunately.
@Koz Thanks again for your help. I'm using Activate Object at the moment, but the problem is I'm using it across scenes, so every time I update the menu prefab, it loses the connection to those objects in every scene. This is why I need a solution that can work on a global level as opposed to a per scene basis. I thought tagging or layers would be a great way to turn objects on and off without having to name those objects directly...?
Thanks for the responses guys - but I'm still looking for a simple answer.
To clarify: I'm using a menu prefab. It's working fine, but when I update it in one scene - it loses all of its "Game Object Name" connections in every other scene.
So I need an action that will activate objects without me having to name them specifically, so the menu prefab works across all scenes even after I update it.