Triangular cannon. Why? "cause I said so DAD!"

“Hey dad, I want a cannon so I can shoot bad dreams away”.

“That's a great idea!" 

--Three hours later--

 "Here, son, look at this amazing cannon that i found and printed!”

“Great! I want seven of them! - but small enough so i can put them on the window ledge."

“…”

“… seven? oh, OK”

--Ten minutes after giving my 4 year old the seven cannons--

“Dad, why the rod breaks?”

“Oh, you broke a rod? That's OK, you have six more…Oh, you broke all of the rods…”

“Dad, i want a cannon with a rod that doesn't break (throwing the cannons at each other)"

“OK, i will see what i can d….”

“And i want it purple, and i want it in a triangular shape!”

“Triangular? but why? it doesn't make any sense!”

“Well, because i said so! And I'm sure you can make it - I told the kids at kindergarten you can make anything!”

Me, eyes down, sobbing for the future lost night of sleep: “OK”

---so here it is. a remix of the great Magurro cannon, with a metal rod, and triangular shape.

It is smaller, with a reinforced spring (QA by my son) and a bigger handle in the back. i didn't make projectiles because we shoot balls of paper and legos.

I printed it successfully with and without supports, but a brim is recommended anyway.

Things you need:

3mm threaded rod - 7cm length

1X 3mm nylock nut.

Assembly: 

Screw the nylock as seen in the picture, insert the rod and screw the handle in the other extremity, until it is tensioned against the spring. For this i pull back the spring and grab the rod with vise grips. the threaded handle is very snug, but works really good.