Bartus,
I feel your pain! I have two girls with limitless energy and the "Daddy's Girl" syndrome. There is nothing and nowhere safe from wee hands. My oldest is 5 also and at about three I started letting her have PTE and Corps figures as well as the occasional Scarlett and Bombstrike figures. She's about due for another, maybe Baroness. This has kept her happy and out of Daddy's toys. My younger daughter just gets into sissy's and also leaves mine alone.
Until just recently, I haven't had access to a good area to shoot pics or even set things up without aggrevating my wife (who is patient enough considering there has been a Bradley sitting next to her art glass for the last two years). We moved into an older house with (insert angels singing here) a clean, dry basement! I have a work area and that added to nearly an acre of yard...and well I have big plans!
These little guys are also very therapeutic. They seem to give me an outlet for all that negative energy that the morons in management and their idiotic ideas at work make me generate. I come home, handle the chores and steal down stairs to work on a custom, or clean a long dust vintage or just "play" with the idea of how fun it would be to drive a Warthog to work and merely imply that that brand new Porshe in the parking lot that took up two spots just happened to be out in the aisle a little too far...it wasn't my fault it got clipped (crushed flat) by my tank tracks.
Seriously though, there are ways to get good pics in public places. All this without gathering an audience. Early Sunday mornings are one good way. I know with kids, especially small ones, that it isn't always easy to get up and away but if the wife is willing to get up with them one Sunday out of the month and you can plan for what shots and have sites scouted out, you can get a great deal done in the space of just a couple hours. Afternoons, early (2:30ish) are also pretty good. You may not be comfortable shooting a Cobra column marching in review, but you should be able to get a small scale ambush or firefight.
The only thing I can say is to keep this form of Joe alive, we have to make the time and effort to stay of Hasbro's collective @$$ to provide product that isn't just geared for the "MOC" collector but also for we "Get 'em Dirty" collectors.
Keep swinging!
Bayer