Get a toy yo-yo and practice using it. Use a piece of clear tape to attach a piece of gum centered on the side. Leave the gum in the wrapper. Now use the yo-yo as you normally would. The gum will come shooting out of the wrapper.
Scientific Principle at Work
The spinning yo-yo, like any spinning object, creates a force on each part of it equal to mass times radius times the square of the rotation rate. In other words, the faster the yo-yo spins, the larger the force it creates. So the harder you throw the yo-yo, the further the gum will fly.
Note: If you’re under the age of 18, be sure your parent or guardian knows what you are doing. Some of these experiments require the use of simple household tools, such as scissors and knives, and some could make a mess. Ask your parent or another adult to help.