DS is starting school on monday and I need to turn up his trousers - they're currently about 5 inches too long! Does anyone know a way of doing this that allows the hem to be let down again when he grows? I've hemmed plenty of my own trousers before but don't want to trim off all the excess material and have to buy new ones as soon as he grows. I can either hand sew or use the invisible hem function on my machine. TIA!