BigMA lists 4 within 30 km of Kanata, 2 of them in Kanata itself.
Which No-Gi gyms near Kanata have kids classes?
Brave Martial Arts Institute, De La Costa Academy | Ottawa BJJ & Self Defense and MMAFA (Mixed Martial Arts Fitness Academy / Kids Martial Arts / Muay Thai Kickboxing / BJJ / MMA) list classes for children.