access the toolstripmenuItem of MDI form from child form

How do i disable the a toolstripmenuItem of menustrip in an MDI form from the child form.
or
can i access the toolstripmenuItem of MDI form from child form saying some thing like

this.MdiParent.MytoolstripmenuItem??

well i dont to pass the MDI form instance to every child form, just to disable some toolstripmenuItems

Any help is appreciated

red