The see-saw swing is one of the most popular toys here. There is one in Perry & Lennie’s cage & also one in Dalai’s cage. Moriarty does not have one in his so his first encounter was when he was out & about. He ignored it for a time but after a little encouragement & tapping on it he finally, tentatively climbed on. Unsurprisingly, it was an instant hit with him!
The see-swing does, of course, require another to be sat on it for it to be used to its full capacity, so I am pleased to report it is used by both Lennie & Moriarty.

If there’s anything better than a budgie on a swing (and there aren’t many), it’s TWO budgies on a swing!
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Agree! 😀
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