If you take a dried calabash gourd or coconut shell and fill it with seeds or dreaid beans what instruemtn have you created

Its called a Maraca. Also called rumba shaker, is a rattle which appears in many genres of Latin American music. Its shaken by a handle and usually played as [art of a pair. Rattles are made from gourds which are the grips for shaking wile the round calabash are fitted to a handle.