Well dangit, blogger is having issues letting me upload the rest of the pictures to finish this. So here's the last half or so of the tutorial. I'll get the first set of instructions included when I can.
****************************************************
Now tuck the right side out one inside the wrong side out one, matching the seam and corners to each other. We're going to sew the rise now, see my orange line? That's where we'll sew the rise seam. This is what it looks like tucked together.

This is what it will look like after sewing. Flip it all right side out.

Now it looks like this:

Next is hemming the pant legs. Option 1: fold under 1/4 inch, fold that 1/4 inch over again, pin or iron in place, and sew it down. Option 2: serge or zigzag the raw edge, fold over, pin, iron, or just hold it, in place, and sew it down. You can see I've chosen to serge. Then, either finish (finish means zigzag or serge the raw edge of the fabric) the waist edge, or fold over 1/4 inch and iron it down. Now it looks like this:

Ok. Now you have two options to finish the waistband. Option 1: Stitch the waist down all the way around, leaving a one inch hole open to slip elastic through. Put a safety pin on your elastic and slip it through, pull both ends out, sew the elastic together, then sew the one inch hole shut. Option 2: Sew elastic together, hold it in the folded down waistband making sure it's away from the needle, and stitch the waist down this way. I use option 2, it's just less fuss and is done much quicker. To decide how much elastic I need I held it around my 2yo's waist unstretched, then cut it the exact length of his waistline. I overlapped half an inch and sewed it together, then sewed the waist as option 2 describes. I use cotton braided elastic, and this will seem loose right after sewing, but the elastic will shrink after washing and drying and then fit nicely.

Sewing the waistband down with the elastic held in in it. By the time I get halfway around I will have to adjust the elastic a bit to get it right, and on the last stretch I will have to pull the elastic out to hold the fabric straight for sewing. If you're uncomfortable just winging it around like I do, go ahead and pin it in place, stretching the elastic out before placing each pin, then sew.

Yippee!!