Our Penguin wooden rattle is sure to make any babes day! Permanently engraved on the front, there is room on the back to add your persoanlziation. The penguin rattle has a very gentle and soft rattle sound when shaken. This toy is 100% organic and safe to be used a teether as well. We've made it a tad smaller than our other rattles measuring at 2.75 x 4". Since there is no hole for a child to grasp onto, they can get there whole hand easily around him and he is lightweight.