Baby gates, while useful for safety, are really annoying. If you’re lucky enough to be 5’6″ or so, they’ll come up to your mid-thigh or lower. You can then try to step over it and risk the chance of tripping and smashing your nose on the floor. Or you can remove it, step through, and replace it, which is so annoying that you’ll stop going to the room that the baby gate has cordoned off, eventually forgetting that that room even exists.
Maxwell’s Li’l Demon solves that problem. The demon is actually a field designed to pass those who are 3 years old or older and be impervious to those who are younger. You will walk straight through, while your toddler will pull up on it and wail at being excluded. Future revisions of Maxwell’s Li’l Demon will let you set the age limit.