https://news.sky.com/story/mouse-proud-rodent-seen-tidying-up-tools-in-garden-shed-in-south-gloucestershire-11670747 (https://news.sky.com/story/mouse-proud-rodent-seen-tidying-up-tools-in-garden-shed-in-south-gloucestershire-11670747)
Obviously they would only be able to haul items roughly around 1g. But imagine the possibilities!