The first part of this underwater adventure where your little one will learn or review math skills while playing with Grin and his underwater friends for boys and girls from 4 to 6 years old with more than 1500 different exercises. THE FIRST NUMBERS AND COUNTING: Identify the numbers up to 10 and up to 20 in a table of 100, relate numbers and quantity, trace / write numbers, balance scales (visual sums), compare numbers and quantities, memory, numerical and logical series , to size. GEOMETRY: Draw basic shapes, identify 2D figures, logical series with shapes and colors. MONEY: Identify the cents and euro coins. TIME: Hours o'clock, and a half, and a quarter. ADDITION AND SUBTRACTION Mental calculation with 34 levels (only up to number 100) and vertical operations of addition and subtraction with 17 levels leading and not carrying. PROBLEMS WITH SIMPLE TEXT: 5 levels to read and respond to the problems of addition and subtraction. Each child is unique so we have crea...