Disable/Enable tag groups leaving lower level.

Hi there, I was wondering if anyone could lend me a hand.

I have a block made up of hundreds of smaller blocks. Initially I want to start off with just the base layer of blocks, once the user has removed the chosen blocks they will hit a button which will lock the lower level and then add another layer on top.

This will go on for 5 levels. I have assigned each layer a separate tag and have been reading up on the GameObject.FindGameObjectsWithTag function.

I've been learning a lot so some guidance would be great.

Thanks for your time, Dun