Well, how I got my mom to get my a BP (she kept saying no every time I asked because my sis had a BP and it was really mean and wouldn't eat) was telling her facts about them and taking her to the pet store to look at them and handle them. Eventually (with 3 weeks of doing so) she let me get a BP and I've had this BP for a year now. My mom used to say no every time I asked for a snake but when I was 10 she finally let me get one and the one I got was an albino Corn snake.

Btw, to prevent an escape I use these enclosures that come with their own lid. The lid is a screen top and it slides in and locks in place so the snake cannot escape by pushing the lid up. With regular screen tops the lid just come right off but there are these clamps that prevent it. Only one of my snakes has one of the lids but I put a heavy object on the end opposite from the light so the snake cannot lift up the lid.