I remember chasing the rugrat (my brother) out of the kitchen all the time. "No, it's hot!" He was about 3. Dad got tired of us telling him "No" so he told us to let him touch it. We all stood there and let him touch the stove and burn his fingers, Dad did have the First Aid kit ready. He touched it, it was hot and we said in unison, "It's Hot!" He cried, Dad put a bandaid on his barely burnt finger and we all hugged and kissed him until he felt better. After that, before he touched anything new, he would point and ask, "Hot?" That lasted until he was about 5.