Sorry guys, just think there might be more ladies with good answers to
The draw string on my sweat pants came out during the last wash. What
is a good method for putting it back?
When I was younger I was told you use a safety pin to push it a small distance into the opening, then you 'pull and draw' the pants to get it the whole length through.
When the string came out of my bikini top, I sewed thread onto the end of it, twisted the thread several times around the end of a knitting needle (with a stopper at one end, of course), tied it off and then threaded that through the channel. It required a little more effort than using a safely pin, but the length and smoothness of the knitting needle made it easy to push through.
To be honest, HoboPelican's and David_Pady's suggestions sound much better and simpler.
Or you could try a biro lid (one with a hole in the top) if the cord is thin enough: thread it through the pen lid, tie a knot in the end to stop it from coming back through and then thread the pen lid round.
The safety pin thing works for me, just go at it for awhile.