The server is definitely a great place for young people; fostering a friendly playing environment for players such as your son. The team of admins work diligently to maintain said environment, and are always around to answer questions.
As you've been over the rules with your son, I've whitelisted the name 'ltrs5555' and you should be able to connect via the server IP mc.indiesquish.com
If you have any more queries, don't hesitate to ask
Hello, Bonjour, Hola, Hallo, Hej, こんにちは, مرحبا, 你好, Selamat pagi, 안녕하세요, ສະບາຍດີ, สวัสดีครับ, Xin chào.