Senja - Aug 25-27

We will be in Senja for two days between Aug 25-27 with our almost 3-year old : what are some things that you would suggest for this time? we will have a rental car and will be driving from Tromso to Senja on Aug 24.

Also - hoping against hope, but are the northern lights ever visible end of Aug? if yes, is there a way to track them? Thanks!!!