Youth/Kids Training

Both children socially isolating at home and being home schooled. My 12 year daughter (mainly swimming and ballet x6/week) asked to have a go on my indoor trainer/wattbike,. Using the wattbike app to perform a sub-maximal test her baseline FTP is almost 4.6 watts/kg. It has taken me 18 months to get there! Not sure if sub maximal test is the best on that platform but wondered if anyone had any thoughts regarding relevance of ftp and other metrics at that age? She seemed to enjoy her time on the bike and I’m using it to encourage her to join me when we are all able to go back outside after quarantine rather than trying to train the next Lizzie Deignan, but who knows!