I don't know about you, but in my family rock collection is a favorite past-time. My boys simply LOVE collecting any type of rock they can find, so this book is really great for them. It not only provides a lot of information, but it can be read independently by my 7 year old, and helps both of them achieving some sort of organization in their ever-growing collection.
You can download this free book (in a .pdf file) here: The first book of rocks
Friday, August 23, 2013
Thursday, August 22, 2013
Here is a great collection of public domain books on the subject of microscopes, their history and activities you can do with them at home. Just click on the picture below to get the links. Enjoy!!