* Make Homemade Glue from Milk
With milk, white vinegar and baking soda, you can make your own glue right at home. Make it an investigatory project by changing up the recipe and testing which results in the strongest glue. You could also try varying the ingredients to make it dry faster, or work on different materials (wood vs. plastic vs. paper).
* Chalk Out of Seashells
The study on the production of chalk out of seashells were designed to produce quality dustless and long lasting chalk to compare with the standard existing commercialized chalks if there are any, which was sold in the market. The chalk out of seashells is for local or non-local used for schools or any educational aspects or even at home which can be form into different sizes and according to your will. I used the seashells to recycle and transformed it into a useful product that will be used in our developing community.
* Soap Out of Guava
Basic hygiene should be available to everyone, but what about people who live in areas without easy access to grocery stores or pharmacies? This is a great question that makes you think about scientific alternatives to store-bought soap.
* Making Biodegradable Plastic
Plastic bags are actually illegal in Santa Monica, CA (and soon to be Los Angeles) because of their threat to the environment due to insane resistance to biodegradation. I didn't think they were that bad, but one plastic bag can take up to 1,000 years to break down completely, and it can even ruin your car along the way. So, creating a better biodegradable plastic bag would be a huge achievement. The only question is how one would go about doing so, and what materials could be used? That's the question you can answer for your project. This project used cassava starch as an effective component for a biodegradable plastic, but you could try using a few different starches and see what works best.