For children aged 6–15. Swim: 150m triangular course at Nafplio port (water start, metal ladder exit). Run: 1 loop through Nafplio streets. Strava run: https://www.strava.com/routes/23602691. Mandatory swim buoy (lifebuoy). No overall winner category. Age categories (boys/girls): 6-7, 8-9, 10-12, 13-15. Race pack pickup at Fougaro Art Center: Fri 17:00–21:00, Sat 08:00–21:00; Sun 06:30–11:00 at Nafplio port next to transition zone. Guardian signature required for minors. Required documents sent to contact@why-n.gr up to 2 days before race. TOE card + valid health card (or recognized federation card), or health card + TOE Day Pass (€10; under-15s exempt). Day Pass: https://hellastriathlon.gr/product/triathlon-pass. Pricing tiers: Early Bird (first 50 registrations or 2 weeks from opening), Running Late (next 100 or 6 weeks from opening), Never 2 Late (available spots until 3 weeks before race), Last Minute (remaining registrations, including on-site). Contact: info@why-n.gr, 210-9830680.