Yes, you can use the RegAPI, create your island, and bring teens onto this island through your own website. You can form groups that include teens and IM and exchange objects with teens who come in through your RegAPI. However, in this case, the Teens will NOT be able to leave your island and visit other spaces, including the Teen Second Life "mainland" (Teen Second Life). In this "closed island" model, you can form groups, IM your teens, and exchange objects with them; but all these activities are limited to your island. If teens want to participate in Teen Second Life, they'll have to create a separate account (teen.secondlife.com).