Turtle head with locking mechanism

This is a remix of the turtle head of "Squishy Turtle" by jakejake. You will need to download the other parts of this turtle from the original design (see link at the left)

I have a small child who loves to play with these turtles, but he removes its head all the time and it always gets lost. Because of this, I created a remix of the turtle head that can't be removed after the turtle is assembled, but it's still possible to hide it in the shell as the original design.

Thanks to jakejake for a brilliant design!

PS! If the original author creates a head like this, I will ofcourse remove this remix :)