UGears Steampunk Submarine is a 1:48 scale DIY wooden mechanical model sold by UKidz in the Smart Series featuring 200 laser-cut parts, a rubber-band motor that drives it about 2.5 meters, a Start/Stop switch and ratchet key for winding, twin spinning propellers, movable fins and front-wheel steering for straight runs and graceful turns; easy difficulty, approximately three hours assembly, no glue required, model measures 5.5 by 3.5 by 5 inches and makes a distinctive gift for model hobbyists and STEM enthusiasts.