Once I checked it out, the instructable robot in me smiled and said ...I can easily make that!
(It's such a relief to occasionally drop an "f-bomb" and the recipient isn't offended)
Let's get started so you too can bomb away....
Step 1: Scrounge Up Some Materials
a Baseball - I like the weight of a baseball, but any ball will work (i.e. styrafoam, tennis, metal...)
Patching Plaster - generally used to fill holes on walls but instead will be used to create texture on the base of the bomb
Rope - to resemble the fuse
Balsa Wood/Cardstock - to create the little letter "f"
Silver/Metallic Acrylic Paint - to give the appearance of an iron casing
a Large Washer - to keep the ball from rolling and to act as a stand
Glue gun, Scissors, Exacto Knife, Paint Brush, an hour of drying time
Step 2: Attach "fuse" to Base(ball)
(Don't worry about the way it looks - - once it is painted, the glue will resemble a welded connection.)
Step 3: Texture the Ball
Step 4: Design the Letter "f"
With the relative size in mind, draw/trim the letter "f" from the balsa wood (or cardstock).
Step 5: Paint Da Bomb
Likewise, it doesn't matter if you attach the "f" to the ball before or after painting.
(If after the paint has dried and the bomb appears too silver, you can tone it down by rubbing some shoe polish on the surface)
Step 6: Proudly Display (or Drop Unexpectedly)
While my cats were not pleased being on the receiving end of the "f-bomb", there are plenty of robots that would loooove having one for their personal use.