My guild has held a few classes for children. We learned really quick most children under 10 were annoying. All they wanted to do was turn knobs or make the machine run fast. Teaching my granddaugther and her friend the basics was fun, just the two of them at age 11. They used my regular sewing machines. My granddaughter started sewing without a needle when she was three. She got over the knob turning and making the machine go fast by age 4. I put the foot pedal on a foot stool so she could reach it while still sitting tall enough not to bend over.