Weather & Climate - This is a great experiment for students to discover the atmospheric conditions that need to be present in order for a cloud to form (warm, moist air, cooling, cloud condensation nuclei).
Create a model of Ocean Zones (layers of the ocean) using a jar and several household ingredients! Objectives: Identify the different layers of the ocean. Describe what lives in each layer of the ocean. Use small motor skills to pour objects into the jar.
Take your or grade animal/ecosystems unit to the next level. I always underestimated having upper-elementary students study animals--until I implemented organism research as a Project Based Learning unit during our study of ecosystems;