Calling on the Internet to Do What It Does Best

MY ELDEST daughter is now at the age where she points to everything, even things she recognizes, or even if it happens to be a vague object off in the distance that only she can see, and asks, "What's that? What's that called?"

She's posed this line of questioning several times with regards to a particular bush that we regularly pass on the way to the park. With both of us unable to give her a satisfactory answer, she's taken it upon herself to name it "yellow fruits."

So, with the aid of the above photos, I'm calling on the collective power of the Internet to help identify this bush, which in late summer began to produce yellow, sometimes orangey, speckled apple-sized fruits, grows about waist-high at its peak (though it appears to have been pruned, as it forms a decorative perimeter to a grassy lot), and is fairly unremarkable as far as its green, rounded, slightly ridged leaves are concerned.

Doing this the usual way, that is, by Googling for "yellow apple-sized fruit" turns up a lot of searches about yellow apples, but otherwise hasn't been very helpful so far. I'm hoping the crowdsourcing/social media method turns up some results.

Please leave any and all useful suggestions in the comments, and thanks in advance.

[UPDATE: We think we may have a winner: the Japanese Quince, aka Chaenomeles.]