Ewan Tesla is about halfway through his teen years; Elise Tesla just became a teen.
From the Journal of Elise Tesla
Let me tell you, finally being a teenager isn't all it's cracked up to be sometimes. One thing that would revolutionize my life, is if my mom wasn't so weird.
I just asked her to give me some gardening tips so I can use some of the plants in scientific experiments. But she drives me insane, going on about the fact that she's a Space Ranger, how she learned more about botany since going into space than she ever learned on earth.
She's told us a million times about how she walked on Sixam, the alien planet.