Henry has decided that he's not a knight, he's a builder. (A musical builder. He says: "When I grow up to be a builder, on rainy days when it is too cold to build I will play the accordion.")
At daycare yesterday he apparently drew (not dictated, I've been corrected) the following design for a catapult, which was immediately emailed out to
all the parents. (Actually this sort of email contact, twice in two days, is pretty unusual for them.)

Now it seems Henry and Ken and some other interested kids and parents are going to build it.
Henry: "And you feed the ball up through the legs of the catapult, and it goes inside, and you pull the rope and it goes HHHHHmmmmmmmmm on the head of the bad guy."