Playroom and Question

So we made the decision to remodel the basement into a playroom.  A basement remodel is much needed....it is really old and out dated and not touched in years.  So I have been pinning ideas like crazy.  I know he is only 3 months old, but I am planning for when he is older.  We have a pool table down there that we are debating selling.  The room will be nice, but it is hard to get rid of a pool table.  We will see. Also hauling it out will be a pain!

Now a quick question.  I have joined a mom's group every Wednesday.  Two of the moms have invited me to a "Fun Splash" baby group at local pools.  I figured my baby is too little for this.  But, one of the mom's baby is 3 weeks YOUNGER and the other mom's baby is 2 weeks older than my baby.  I called my doctor's office and they recommend waiting until he is 6 months to dip him in a pool.  They said other babies poop in the pool and they don't want that getting into his mouth.  I think 3 month's is too young.  I would consider at 4 months but I also think that is too young.  What do you think?