Play Group.. is it necessary?

Ahza, my first son.. now 3 years old forwards...

Me and my hubby having plan to send him to Play Group nearest by our residential next three months. Hopefully he could play with others kids and could be more self confidence and independent.

Previously I have a question to my self.. is it necessary to send my kid to Play Group (PG), meanwhile he could be play every time in our house with the same toys that provided in the PG? In the morning and the evening Ahza playing with his mate constantly. there's about 5 kids which is the same age with him.

but when i saw he growth as an active boys.. I think I have to send him to PG so that he could be more exploration his energy and his talent.