Ron, there are no "adjustments" on a ceiling fan of this nature, with the exception of blade balancing kits, which are a bit lacking.
I'd first look at the fan while it was off, using a step-stool or ladder to get "eye-level" with the blades. First, look to see that the fan's downrod (if mounted this way) is centered correctly. Sometimes at the top of the downrod there is what appears to be a black ball-shape, which often has a "key" on it which needs to be seated in a keyway. If the key has been knocked out of the keyway it can throw the fan off balance.
If this is not the problem, look at the blades in relation to each other for any large variations in pitch or level of one blade compared to others. If blades show sings of warping (from tip to mounting point), you can buy replacement blades. Next look at the blade mounts, slowly rotating the fan watching for variation between the mounts. Many blade mounts are easily bent.
You may be able to solve the problem, but if not, be thankful the fan can be replaced for a minimal price, and your child was not injured.