“Oddo” is a tool for young learners between the ages of 3 and 6 years old. Its purpose is intended to illustrate basic mathematical concepts. As children are visually developed first as compared to the rest of their senses, it is usually easier to capture their attention through the visual aspect. Therefore, I made use of the Fibonacci sequence in my design process to help me create an interesting and well balanced form. Taking reference from how the domino tiles portray numbers, my product adapts this idea to show the process of basic mathematic concepts such as addition. Through this illustration, mathematics is made more comprehensible and engaging. At the same time, young learners can understand mathematics more effortlessly. The outcome of this project aimed to develop a mental image for children which would lead them to performing mental sums.