I guess average workload. Would give 5 stars for that. but there were 13 and 16 in the box so I went and hired a math teacher and after a few months I found I could count. After sorting it out, I noticed that some of them looked smaller than others. So I went and had my eyes tested and lo and behold there were 4 lungs mixed up. So actually I got a 9 for the price of 16. I am so thankful for this test that not only did I find out that I can count correctly, but that my eyesight is too strong. If I hadn't bought them, I would directly blame all of life's failures on my eyesight and counting skills.
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