First they both just waved the swords at each other, then discovered what fun it was to clink them together, then they lightly tagged each other with them, which turned into Ava accidentally whacking her brother in the head... of which I just happened to catch a picture.
Jax, being the gentleman he is, slowly placed the sword down rather than seeking vengeance and knocking his sister's block off. As I consoled our little knight, Ava grabbed the sword handed it to Andy and said, "Daddy, since Jax is dead you can have his sword." Apparently, she knows a little more about midieval history than presumed. Jax didn't seem to mind, he moved on to lining up trains...
while his sister continued to poke him with the sword.
If this really were midieval times, I wonder which of our children would be the white knight and which would be