This is VERY preliminary but this is the situation today 30.1.2014.
Raseborg Långåmossarna (with Karis hembygdsförening/sällskapet Natura) early May 2014
Raseborg Säterigatan (with Karis Billnäs Gymnasium) May/June 2014
Vantaa Jokiniemi (with Heureka and Ango ry) 21 - 25.7.2014
Pitäjänmäki Leikkipuisto (with schools in the larger Helsinki region) late May 2014?
Stay tuned, more info as things progress (and subsequently .. change ;)