1. An instructional aid comprising: a plurality of objects in which each of said objects: (a) corresponds to some integer number from one to ten inclusive, (b) has a thickness dimension which represents the relative value of the number to which it corresponds, (c) has the shape of the Arabic numeral representing the number to which the object corresponds, with the exception of the object corresponding to the number ten where that object has the shape of the Arabic numeral representing the number one. (d) has at least one surface being of a color or combination of colors representing the prime number or the prime factors of the composite number to which it corresponds, wherein: (i) said one surface of each of the objects corresponding to the prime numbers two, three, five and seven is a different color, (ii) said one surface of each of the objects corresponding to the composite numbers four and eight is the same color as the color of said one surface of the object corresponding to the prime number two, (iii) said one surface of the object corresponding to the composite number nine is the same color as the color of said one surface of the object corresponding to the prime number three, (iv) said one surface of the object corresponding to the composite number six is divided into two portions, one portion being of the same color as the color of said one surface of the object corresponding to the prime number two, and the other portion being of the same color as the color of said one surface of the object corresponding to the prime number three, and (v) said one surface of the object corresponding to the composite number ten is divided into two portions, one portion being of the same color as the color of said one surface of the object corresponding to the prime number two and the other portion being of the same color as the color of said one surface of the object corresponding to the prime number five.