http://eequalsmcq.com is a website that has a free Life Science ebook that I’m currently using with my 6 year old. The teacher who wrote these books does a 50% off sale on his other books each January. The other books normally cost $50. The sale runs from the 16th to the 22nd of January. See http://eequalsmcq.com/HolidaySale2012.htm for more info. He has a preview of each book, so you can decide if you like them before you buy.
Thank you MUCH and Karma to you 
Susan Khan
Hi, I have used Experiland’s books before and found them very enjoyable in finding ideas for the classroom…They also have a life science book at: http://www.experiland.com/html_books/mad_scientist_life-science.htm which seems reasonably priced @ $15…