Add the turtle shape from xcs shape.

select main shape line and add an outline with 0 distance.

change this layer to red color.

Select the shell and copy past for layers.

change the color to purple.

copy one more.

Select the red color and add setting.

select the purple color and add setting

auto measuring.

start processing

Assemble all parts with wood glue

when the glue is dry, add paint as you want.

I am sorry for my painting skills. :(

That's all.

Thank you