A number line is a series of numbers placed on a straight line in order from least to greatest. This is a helpful tool for adding. In this game we have a dog and he looks for his bone. He hides a bone somewhere,but now he don't remember. We must find the sum of an addition and afterwards our dog win his bone. We have many possible additions and the game every time chooses an addition by using random choice. The time to answer is 20 Sec. For the answer we must move a slider and create the appropriate number. If we answer right the dog walks in the Number line and make stops in the addend and in the sum and the student understand the addition problem. This is a helpful teaching resource for Teachers, Parents and Students.