Where do carp congregate in a lake? Is there any particular area or structure to look for?

10yo Gson now fully addicted to fishing (unfortunately, to the detriment of everything else). Started a physical, with photos, life list back in July. Next up on his "wanna catch" list is carp.

I usually fish gravel banks and sand flats if you chum they will come

You don't have to cast far off the bank - chum a spot with canned sweet corn carp will show them selfs by rolling.

You can also try ponds at local parks. A lot of these ponds have carp in them and sometimes you will get a nice surprise and find a pond with really large carp even in a small pond.