So sorry it took so long for us to get back with you. There was an issue with the forums, and your new post got lost in the shuffle.
Since you went over the rules with your son already, I tried to add SmithyPNW to our whitelist (only username I could find). But MC returned an error that I couldn't add him. This usually means a couple things. Either it's not the correct username, but you can get back with us with the right one. Or you are using the wrong version of Minecraft. This server runs the Java edition of Minecraft, and isn't compatible with any other version such as Bedrock, PE, or any of the console versions.
Apologies again, for the additional trouble. Hopefully we can get this sorted out for you. Get back with us, when either of the things I've mentioned has been addressed, and we'll get you squared away, as soon as possible.
- Indiesquish Admin Team