Here's one more about audio recordings in Virginia. It looks like only 1 person has to give consent and that can be the parent giving consent for the child.
Virginia's wiretapping law is a "one-party consent" law. Virginia makes it a crime to intercept or record any "wire, oral, or electronic communication" unless one party to the conversation consents. Virginia Code ยง 19.2-62. Therefore, if you operate in Virginia, you may record a conversation or phone call if you are a party to the conversation or you get permission from one party to the conversation in advance. That said, if you intend to record conversations involving people located in more than one state, you should abide by the recording law of the most restrictive state involved, or play it safe and get the consent of all parties.
http://www.dmlp.org/legal-guide/virginia-recording-law