Wave Energy
Wave energy is the power that moves through water, shaking and pushing things in its path.
Think of it this way
Drop a stone into a bowl of water. Rings spread out from where the stone landed. Each ring pushes the water up and down as it moves. A cork near the edge bobs as each ring passes under it.
Explaining wave energy by grade level
Drop a rock in a pool. Waves spread out in rings. Those waves push a leaf on the water. Waves carry force from place to place.