I would restrain Oscar's hands BUT not before putting him in a pair of dress-up glittery fairy wings for the day so he can be humiliated at the very silly reminder of the fact he's caged and can't fly anymore. And then maybe parade him around and make him show off the faux-wings as people laugh at him. They'd be scratchy and cheap too, so if he tries to hide his face against his shoulder they tickle and scratch at his head and the elastic straps dig in painfully the longer he wears them.
And then I'd make him beg to have them taken off and be left alone. If he's not good enough at begging he can sleep in them for the night.
He'd be so, so humiliated! Being caged is bad enough, but being made fun of this way is unbearable, and he just wants to disappear, to be alone with his shame. He doesn't strike me as the type to beg unless in extreme circumstances, so he'd have to sleep like that, and the constant rustling and scratching would frustrate him to no end.