I was actually a brilliant thief when I was a kid. I would grab shit from Target, like the bigass $75 lego fucking castles and shit. Then just lurk around the entrance (before they had alarms) pretending like I just ran ahead of my family and was waiting, until a family exited the store, then just turn around and walk right out with them. Same thing with the big super soakers/nerf guns/gi joe sets/etc. I probably stole a total of around $1500-2000 cash from just people leaving their shit around unattended, making to sure to leave some so it wasn't obvious. After stores got alarms, I just started removing the security devices.
At school I would steal other kids homework by not doing mine, being held in during recess to make it up while the teachers were out watching the kids, then just go to the 'turn-in' bin, grab someone else's, erase their name good, write mine in, and stick it back in the pile. Then when that system got found out, they started making me have to have our homework assignments signed off by the teachers, so my parents could see what my homework was and make sure I did it. So i did that for a couple weeks, until I started just making up my own simple and quick assignments, and using the teachers real signatures to forge sign it off everyday. That one never got found out until my grades came in. I'd also cheat on my spelling tests, by writing down all the words ahead of time in form of the test (they gave us the list to study during the week). At the end of the week, before the real test I would put the fake one under my desk, then afterwards, 'accidentally' drop and switch.
This was all before I was 8. Because I remember ironically getting caught stealing a bag of skittles at a 7/11 among all other things when I was 8, and that was well into my, eh... 'career'. Me and my step-dad had to go to court and everything. Never got caught again after that. The school stuff stopped after I moved to MN in 8th grade, but the stealing stuff went on till around the time i got out of high school.
I don't usually like to talk about this because it's not something I should be proud of, but I am. I'm I was able to pull that stuff off at such a young age, not necessarily that I did it.