This indispensable source pulls together hundreds of practical, easy recipes and formulas for classroom, library, and home projects. From paints and salt map mixtures to volcanic action formulas, these kid-tested projects make learning authentic and enjoyable.You've got to have it! This indispensable source pulls together hundreds of practical, easy recipes and formulas for classroom projects. From paints and salt map mixtures to volcanic action formulas, these kid-tested projects make learning authentic and enjoyable. Some activities, such as candle making, hearken back to tradition and can be incorporated into history and social studies units. Others, such as making new paper from old paper, emphasize the importance of nature. All projects use ingredients that are easy to find and processes that are up to date. Tips on when, why, and how to use these terrific concoctions are also included.