My son had a pair of pants that were torn almost as badly as this (yet to be repaired) pair.
adorable monster patch for a child's pair of pants.
At the bright shiny beginning of the project I enthusiastically searched through my scrap bin of too-small kids clothing for just the right things to cut up for scraps. I spent an hour cutting out the background for the mouth (from an old corduroy button down shirt of Michael's), teeth (from an old swaddling blanket), and the eyes (from an old onesie). I fray checked all the edges of the monster components, cut a huge hole out of the knee around the hole/tear/worn material, and carefully pinned everything in place.
I sat down excitedly at my sewing machine to sew the new patch in place thinking I'd be able to hand Michael his "new" upcycled pants in 20 minutes and realized I had overlooked something rather important. I couldn't fit the leg of his teeny tiny jeans over my sewing machine - much less turn the material around in the ways necessary to do the applique. (!*!!!$@#) However, I was not going to be defeated. A little hunting online led me to the conclusion that I was going to have to rip out a huge section of the inseam on that leg so I could lay it out flat.
So that took... a long time. And then they are fleece lined jeans so I had to rip open the lining too. Then I spent 20-30 minutes sewing on the monster pieces with Michael at my side asking when I would be done. He wanted to know if he could wear them right away. It was so adorable. I needed his enthusiasm at that point to keep me motivated.
Finally I was done with the patch itself. I was thinking I was home free. Only two straight lines left. One to repair the inseam of the lining and another to repair the inseam of the jeans. Because I am brilliant and naturally crafty, I only then realized that just as I couldn't fit the jeans on my sewing machine to sew on the patch, I couldn't fit the darned things on to repair the inseam either. I sent more than a few uncharitable thoughts towards the jeans, my sewing machine, and the entirety of the so-close but not finished project. I scrunched up the ankle and managed to sew up four inches of the inseam that way. Then I just pinched the darned thing closed and sewed it from the outside. It's not like anyone is going to be staring at his inner thigh anyway.
The boy is so excited. He couldn't wait to wear them to school today. As for me, well... It may have taken three hours, but I'm pretty pleased. I didn't have to throw out one of Michael's favorite pairs of pants and he sees it as a significant upgrade so I'm calling it a win and a learning experience. Now I just have to take on about two other pairs of jeans with similar knees...