This will be their first grandbaby. I already had a trip planned to see them after the holidays.  I found out nye we were expecting so we decided to tell them while visiting because I wanted to do it in person. I salvaged some old fence boards and painted this (got idea off etsy). My mom cried my dad was beyond excited! 
We will tell my husbands parents after hearing heartbeat, it will also be their first grandbaby.                
                
             
        
Re: telling my parents
I dont think the desire to want to make your parents proud ever goes away!!
And thank you everyone else! They loved the sign, we made custom coffee mugs to tell my PIL. My parents own a business where they make custom gifts (I.e. shirts tiles mugs etc.) So they helped us we just designed them.