good girls get an extra hour in the ball pit
Ball pit volume (from a wikiHow post 138240 cubic inches.
A standard Blåhaj is about 40 inches long. I don't have one on hand for precise measurements, but let's eyeball it and say that the thickest part is 5 inches in radius and 20 inches long (not counting tail/fins), for a total volume of 1500 cubic inches.
This gives us a surprisingly low count of 92 sharks for a pit, suggesting that a Blåhaj pit can be filled for under $3000 (US). Pit wall construction, shipping, errors in my size estimate, and the fact that shorks are compressible means we'll probably be spending closer to $4000. If the supply of shorks or funding is insufficient, a mixture of shorks and balls can be substituted; further analysis is necessary to determine an acceptable ratio but 1:10 (by volume) is probably possible.
Of course, we also need a complicated-looking, yet safe contraption with which we can capture spies and throw them into the pit...
