ISBN-13: 9781440412035 / Angielski / Miękka / 2008 / 32 str.
Introducing youngsters to concepts of math and science is very difficult without the right tools. In the myriad of counting books on the market today, there are very few, if any, that introduce the concept of negative numbers. There are plenty of children capable of learning this material, so here is the first in a series of books designed to subtly introduce advanced concepts to youngsters so that it builds a strong foundation of learning.