I had to laugh when I read the one where the child was allowed to sew, but not to iron. I didn't learn to sew when I was tiny, but Mom had me set up to iron the family handkerchiefs at a pretty young age. I loved being allowed to help, as my mother was often overwhelmed with the ironing. I say the younger the better, if the child will listen, practice and have supervision. Skills learned when one is young can become "comfort" activities when one is older, and the human brain is amazing. I once knew a lady from England who learned to knit when she was four. As a young adult, she could knit a ski sweater and read a novel at the same time, it was so automatic to her. (I thought she was a totally amazing person!) Anyway, have fun with your little ones, and let them explore their wonderful creative abilities and develop their personal skill set in front of your eyes!!