We have construction going on in our kitchen, so we have a temporary setup in another room with a stove there. We put tape across the floor so the kids wouldn't come close to the stove area. Today Angie was warming up some milk and Liani (2) was down there with her. Angie told Liani, "You can't cross this line, ok?" She looked puzzled, took a few steps back, ran forward and hopped over the line and said... "see mommy, I can...."
Of course mommy went on to explain better what she meant....