As an added bonus I will teach your children how to make homeade explosives, improvised explosive devices, defuse and disarm bombs, jam signals and FM communications of local law enforcement and Fire depts, and as a special one time offer how to kill a man with 3 rubber bands, 2 if he is sleeping. Imagine the phone calls you will get after they go to show and tell at school.
I don't think a legitimate defense to the ensuing lawsuits will be, "A scary man living in the tree in my backyard taught my kids all this. It wasn't me."