I told my kids to never touch my rotary cutter, EVER! So, one day my daughter was sitting right next to my sewing box and I see her bleeding from her finger. I asked her if she touched the rotary cutter and she said: Yes mommy, and I did not cut myself". I asked her to look at her finger, and that's when the crying started. The blade was brand new, and she did not even feel the cut how sharp it was. Luckily, it was neither deep, nor large, so a bandaid helped, but none of my kids ever touched my stuff again. Lesson learned.