Add one packet unflavored gelatin and one (3 oz.) jello mix packet to the hot water. Stir for at least 2 minutes or until completely dissolved.
Stir in 1 cup cold water and mix.
Clean stapler with hot water and dish soap.
Pour jello mixture into a medium-sized deep mixing bowl, and place in the fridge to set for 3-4 hours.
Boil 2 cups water.
Add three packets of jello mix (3 oz. each) and three packets unflavored gelatin (1 oz. each) into the hot water. Stir for at least 2 minutes or until completely dissolved.
Stir in 2 cups cold water and mix well.
Remove the mixing bowl with jello from the refrigerator.
Carefully place the stapler upside down on top of the chilled jello.
Pour the second batch of jello mixture onto the stapler. Cover and place it in the fridge to set for 3-4 hours.
Add warm water to a large mixing bowl.
Place bowl of Jello into the larger bowl of warm water for a few minutes to loosen the jello.
After this, you can also use a rubber spatula to loosen the Jello from the sides of the bowl.
Turn Jello over onto ta serving plate.
Display Stapler in Jello proudly, or put it in your co-worker's desk drawer.
Video
Notes
I do not recommend eating jello that has a stapler in it. This is meant to be more of a joke or part of a display.
The stapler will likely be ruined by being set in Jello. The Jello will get into all of the nooks and crannies. Do not use a stapler that you love and cherish for this prank.