miniature football clinic

I walk by this sign in Mong Kok quite a lot. It's on the way to the minibus that I take to HKU, so without fail, a few mornings a week I find myself wondering, "What is a miniature football clinic?!" And unfortunately, the Chinese characters don't offer much help. I think the larger characters just say "small football clinic"... but then I could be wrong.

So, any ideas? All I can think of is foosball, or maybe a HK version of little league...