We bought his parents a picture frame that said something about grandchildren being a blessing. Unfortunately we didn't get a picture of this.
We bought Charles' sister Janice a onesie. It says "My aunt is kind of a big deal".
For my family, we bought my nephew a shirt that says "Cousins Rock".
Of course everyone was really excited! We just made them all promise not to say anything until we were out of the first trimester.