If you want something a little less dangerous and kid-friendly, then just get one of the Nerf products. There is a longsword, an axe, a mace (not the spraying kind), and shield with a small sword. A word of caution: these things really hurt if you get hit with them. They are molded with EVA foam with a strong inner core for durability. It feels like a piece of rebar is running down the middle of the blade.
*pictured: CAS Hanwei – Lionheart Sword