It would be the same weight? But bulkier?

Should be aluminum, way better at taking up space for its weight

With a weight constraint of 80lb, a stainless steel block wouldn’t do a very good job of taking up space (the express purpose of the item) because it would only be 6.5 inches (16.5mm) to a side

Tungsten would do an even worse job! The sides would only be 4 inches (10cm)!

Not safe for school either, but that’s where it happened

Adorable XD