New Where To Look ? Nephew Advice

Well my lil nephew just got a metal detector this past weekend.

I gave him some advice . I took him to a part of town where the houses are built in the pre 1930's some historic 1880 and 1890's we found a abandon old home that looks like its not been lived in for a long time.with a utilitiy shed out back. This was a decent area of town back in the day . But the shipping port got moved to another area of tampa so this area is called old port tampa. I checked the property records the house is owned by someone out of state and was built in 1911

i told him where do you loose coins lets think about it?

I figured people pull keys out of their pockets to get in the their house. Coins prob hit the front steps and roll in the yard.

Back in the day people used to hang clothes out to dry so lets check the back yard for some .

people pull out keys getting in and out of their cars so lets check what looked like a grassy over grown parking area.

we discovered it hard to detect in high grown weeds and grass.

so far we found some nails, bottle caps, alum cans shreds a few 1940's pennies corroded barley readable.

i think we will searhc it again in the winter when the grass dies and the city or someone mows the yard.

any advice ?

we searched a park undr the swings, benches and monkey bars . Found lots of change but nothing just 60
s 70's and newer nickles ,dimes,quaters,broken trinkets and such.chances are its prob been searched alot of times.

my next guess is a old lot with some brick house supports on them and pieces of a fireplace the house is next to two old houses from the early 1900's maybe search it in the winter agian.
in florida the weeds are such a pain

any opinions.