It is easy to determine baby's physical development and facial looking rather than mental development stage. It is important to caregivers to know at what extent their babies have grown mentally so that to help them choose what to do next to them. It is very important to know that if we have a practical tool which will be helping caregivers to determine levels of their baby mental development stage will help to learn together and inspire them all. The tool consists of individual stage development objects to sense, touch, see, hear, move, align, assemble, press, open, close, and finally if a child is able to play with a tool to the suggested stage accordingly we are sure a child have developed enough mentally. Caregivers might help to instruct their children and teach how to play with a tool properly. Tools might be put into stages technically designed to develop and determine early child’s mental development stage. Example, when a baby is born is normally not able to see and recognize objects though eyes are there, also will not be able to hear at sounds though ears are there but is able to respond when their moms put on their breasts. So the question comes from when (time) will this baby be able to see and recognize objects, or hear sounds, respond to commands coming from sounds. Early Language Development Tool (ELDT) is a standardized sound tool, objects shapes, color design designed to determine stage of mental development of children.