I have an idea what the first one might be, thinking its an encrusting Montipora sp., but not sure, so don't quote me.
The bottom one is a green star polyp Briareium sp., previously/sometimes known as Clavularia viridis.
The 4th looks like a fairly common Palythoa sp, sometimes called button polyps, rather closely related to zoanthids. Handle them with care, a few palythoas are known to produce one of the most potent toxins (palytoxin) known. If you handle them, it'd be a good idea I think to wear gloves and safety glasses and have the kids keep a safe distance, just in case.
As for the rest, I've a few ideas, but zero certainty. Whoever positively identifies, I'd like to know for sure myself.