A clear, paced introduction to basic measurement concepts focusing on volume and capacity. The video uses two distinct glasses to visually demonstrate the difference between "empty" and "full," providing foundational vocabulary for early learners. It breaks down these states with simple visual aids, showing clear water filling one glass while the other remains void. The second half of the video transitions from state (empty/full) to capacity comparison. By placing the two glasses side-by-side, it introduces comparative language like "shorter," "taller," "holds more," and "holds less." The narration guides students to understand that physical size (height) correlates with capacity in this context, helping them make logical deductions about volume without needing standard units of measurement. This resource is highly valuable for early elementary math centers or ESL instruction due to its repetitive, slow-paced narration and clear text-to-speech alignment. Teachers can use it to introduce the specific sentence structures needed for mathematical comparison (e.g., "Object A holds less than Object B") before engaging students in hands-on water play or pouring activities to test these concepts in the real world.