Why children feel giddy?

Vertigo? Many children get very dizzy at times without definite cause. Some are due to ear infections or ear fluid pressure. Other times it may happen because of spinning around. Episodic vertigo is a very dramatic event in some children when they look terrified and have to hold on for a few moments, then return to normal. This is usually benign but needs a good evaluation.
Please clarify. I'm unclear as to what you mean by giddy. Please give more details.