Earlier today I managed to get Alistair to take a bath!
It started out with me just playing with the water bowl I had out for him, only to just show him that he had water out of the cage if he wanted.
A few minutes later, he seemed to be flicking his head in the water, rather than drinking.
So I went and got a shallow bowl, and filled it with lukewarm water, even going as far as to put some millet into it.
Alistair was straight up to explore. He sat in the water to start with, not knowing what to do, but he did start to fluff up and flick the water a little bit.
He seemed to like just jumping into the bowl and wading around though. I heard an almighty splash (for a budgie) and he was just looking proud of himself.
I feel bad for not getting pictures. Next time I promise I will!