Pumpkin seeds roasted with a little of salty water is a great (and commonly sold and home made in México) snack. They are also used along with sunflower seeds in preparing some hot sauces and Mole (the hard way). Seeds of Cantaloupe (melon) and Watermelon can be blendend along with their edible parts to strengthen flavor and keep freshness when preparing flavored water. When the watermelon seeds are small, you can eat and chew them along with the fruit: they are usually sweet.