Yesterday I noticed that Finn seemed to be able to kick a tennis ball with his foot while sitting down. So I stood him up and rolled the ball around to see if he can kick now while standing. A few seconds elapsed while we chased the ball around the room, booting it and saying KICK! in a high pitched voice, until I realised - he was saying kick too!
I think he may have said no the other day when being fed, but Finn's first definitely decipherable word is kick