One experiment to test fats in foods for kids in grade 5 could be the following:

Materials: - Different types of food samples (e.g. potato chips, cheese, avocado, chocolate, nuts) - Brown paper bags - Paper towels - Water - Clear plastic cups - Vegetable oil - Iodine solution (can be purchased at a pharmacy or online)

Procedure: 1. Cut small pieces of each food sample and place them in separate brown paper bags. 2. Crush the food samples in the bags to release the oils/fats. 3. Place a small amount of each crushed food sample on a paper towel. 4. Add a few drops of water to each sample and observe if any oil/fat is visible on the paper towel. 5. Pour a small amount of vegetable oil into a clear plastic cup and add a few drops of iodine solution. Observe the color of the mixture. 6. Dip a clean toothpick into each food sample and then into the vegetable oil/iodine mixture. Observe any color changes in the mixture. 7. Record observations and conclusions about which foods contain more fats/oils.

Note: It is important to remind students to handle food samples with clean hands and to dispose of them properly after the experiment.