This one came out of necessity. Yes that Venus McFlytrap, so she was fairly new when she broke (hence the urgency). I searched for repair ideas online, but since I didn't like anything I saw, I figured out a different way and decided to share.
What you'll need:
1. Pliers - I used needle nose pliers
2. Very small drill bit - thinner than the screw
3. Wire cutters - you can get these at Dollar Tree if you don't have any
4. Small screw
First. Drill a small hole into the upper and lower part of the leg (you are going to use the screw as a pin to hold the two parts together).
Second, "prime" the leg for the screw by screwing the screw 1/2 way into each leg part then removing it (this makes it easier to put together later). Use can use a screwdriver or pliers to do this.
Looks good and new. Fixed...and one happy daughter. I hope this helps anyone out there looking for a quick fix for a broken Monster high knee : )