Only one listing specifies a carrying limit: "Holds up to: 5 pounds." Most other listings show the bag's own weight (for example, "Weight: 3.09 pounds" or "Weight: 4.4 pounds") rather than a load capacity.
Suggested ages listed include: 1–5 years, 3 years and up, 3–10 years, 5 years and up, 6 years, and All Ages.