Headu designs fun, high-quality games, toys, books and apps to help teach children essential skills using an innovative teaching method. The material contained in the package is useful for familiarizing children with numbers by developing the recognition of both numbers and quantities, and the ability to sequence and sort the numbers in a progressive and regressive way, reconstructing a real number index. The first activity that is recommended is the representation of quantities. Children spontaneously perceive the difference between two quantities, especially if they are presented with a piece with only one element on it, for example “a giraffe”, and then pieces with more than one element on them (for example, “three cats” or “four dogs”). If children are only a little over 3 years old, we strongly recommend that you first introduce the pieces with the animals on them, saying aloud how many there are and indicating the amount represented with your finger. After observing different quantities, continue to play with the children by comparing two quantities and asking them which piece has more elements on it and which one has less. Repeat the same activities with the pieces with colored dots on them to facilitate the development of abstraction.