Happenstance exhausts any possibility for routine. Present any student a malleable situation eliding definitive criteria and the results vary from either the proverbial five-mile stare or worse case scenario, epileptic seizure. What needs to be stressed is that failure can be serendipitous. Johnny can read (or as it applies, sculpt).
So all my psychic aura is sponged dry, an expedient byproduct of eleven needy albeit inquiring minds. But such a power drain is to be expected. Maybe to reverse the flow involves blistering fingers, bruising egoes and consequently toughening skin.
That is the stated purpose governing any doable three-dimensional curriculum. Establish comprehensible parameters that define the project at hand to allow for lateral movement. But resist spoonfeeding.