The Meaning of Life, the Universe, and Everything.
This mod adds a bunch of traps that activates when a mob steps on them, this can be really useful to protect your house from unwanted visitors.
When I was testing it however, it causes a bit of lag. It might be that my device isn't powerful enough but i'm not totally sure. Anyway, I would really appreciate if you download this mod and tell me if it gives you lag too.
[Working on it, sorry for the inconvenience.]
All the blocks are in the creative inventory.
If you think the mod makes the game unplayable I could make the traps work with a remote control or something like that.