1. How to Make soap out of guava leaf extract for a science investigatory project
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  3. http://science.wonderhowto.com/how-to/make-soap-out-guava-leaf-extract-for-science-investigatory-project-424946/
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  7. In our personal experience, the hardest part about a science investigatory project is simply coming up with a good idea. And we suggest that for your investigatory project you find a topic that's both novel and useful.
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  9. Check out this science tutorial to learn how to make a bar of soap out of guava leaf extract. This guava-infused soap actually helps clear up acne. You'll need sodium hydroxide, guava leaves, containers, and lavender scent.
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  11. http://www.youtube.com/watch?feature=player_embedded&v=Ta08axXeT-g