You can obtain wheelbarrows from mystery boxes

Wheelbarrows let you reduce the work needed to clear obstacles and repair apartments quickly. Each wheelbarrow has a power level, but using a higher-level wheelbarrow doesn’t necessarily clear an object of that same level in a single use.

Easier obstacles can be removed without much effort, while tougher ones may require multiple wheelbarrow uses or additional worker activity before they are fully cleared. Using a wheelbarrow removes work equivalent to several minutes of a worker’s labor at the same level.

To use a wheelbarrow, drag it onto an obstacle that your workers can reach. You can also hold it over the target to see exactly how much work will be removed before releasing it.

Wheelbarrows can be merged to create stronger versions, similar to merging workers. Keep in mind that a wheelbarrow can never exceed three levels above your highest-level worker.

You can have a maximum of four wheelbarrows active on the floor.