Long vs Short Pants

Lucas' childcare teacher said that his pants are way too long and may cause him to trip... She suggested that I get the pants altered or shortened...

So I told myself, its ok, just do some simple hems to make it shorter.. When he grows taller, I can just remove the hems...

See the photo:
Po-po said it looked dam ugly... Well, this is the best I can do lor... I have never been great with needles and thread... =.='''