This is a fascinating and colorful look at the heart and the amazing job it performs. Computer-enhanced photos are used to illustrate the heart and the blood vessels while magnified images give us a close-up look at the blood. Also included are simpler illustrations showing the chambers of the heart, it's valves and arteries and the general make-up of arteries and veins and their valves. The text is simple enough to be understood by fairly young children (particularly as a read-aloud) but is written in such a way as to capture the awe and mystery of how our body works. It covers quite a bit of material in a fairly in-depth fashion - the basic workings and function of the heart, the various components of the blood, the various types and functions of the blood vessels, the basic path of the blood through the body, how the lungs work within the cardiovascular system, the role of white blood cells and some of the problems that people develop in their blood's circulatory system. An impressive, engaging and informative book.

This kit provides dozens of special cardboard pieces, wooden dowels string, wheels, etc. for making simple machines (inclined planes, scales, etc.) that can be used for understanding basic concepts of mechanics - how things work. Based upon the bestselling "The Way Things Work" by David Macaulay, the kit continues the theme of Wooly Mammoths as props and characters for use in these experiments. (Included in the kit are two cardboard Wooly Mammoths to which you affix a certain number of identical coins to provide a common weight for some of the experiments.) A thin, but colorful book (32 pages - glossy cover) takes you through the scientific explanations of the various principles involved in the experiments. 5 1/2 " x 8 1/2" glossy full color cards provide detailed step-by-step instructions (with the typical DK photos) for each experiment.

Although some of the experiments took a little more finesse than might have been expected (but understandable due to the limitations of the materials) and some of the instruction cards were a little hard to follow, overall we found this to be an exceptional value - a lot of bang for your buck at the $30 retail price. We found that a dozen or so ziploc bags were very helpful in keeping the various pieces straight and, with a little patience, all the pieces can be stored in the box.

The biggest hit in our family so far was the Pinball Science CD ROM which also came with the kit. The game includes three pinball arenas each having a specific theme (village, island and moon). The science part involves answering questions in order to earn the right to place certain fixtures on each pinball game. Without the fixtures, scores are lower and players are unable to advance to the next level. With each question, the player has the option to "Research Answer". This feature takes the player to the appropriate page in an interesting, humorous and interactive log book which explains the functioning of various devices such as windmills, faucets, hot-air balloons, gears, and rockets. Some of the graphics are a little silly (Wooly Mammoths in bikinis on the island and such), but I didn't find anything really objectionable.