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.