Humane or not mouse trap:
Bucket
1.25L or bigger bottle, with sticker and lid off
Peanut Butter, or something else sticky that mice like
A long rag or board to use as a ramp
Cut a slit halfway through the bottle about 10cm from the bottom, and slip it over the bucket, with the opening towards the centre of the bucket.
Put the food on the mouth piece of the bottle, and then hang the rag over the end of the bottle. You want it to be secure, so maybe peg it, or hook it through the slit.
Mice smell the food, climb the rag, walk towards the food, and slip off the plastic, into the bucket.
Now, with water in the bucket they drown, otherwise you could use it as a live trap but you might need a deeper bucket. A 44 gallon drum level with a plant bench could work I guess.
Hope that makes sense. If you google bucket mouse trap you can see similar designs.