Great to hear it was an early diagnosis. The success stories you hear about all have a common theme in early diagnosis.
I wouldn't stress too much about childproofing the physical tank. Glass is glass and there isn't much you can do about that.
In terms of lids, I would look at a versa top with a strip light. Here is my reasoning. Those plastic all in ones, while convient, could be damaged and then you have the lid/light being jostled into the tank. My thought, and it is dependent on the parents, is to put a versa over it, then wall mount of ceiling mount the light above the tank. Then if he manages to get into or break the lid, you don't have as great a chance of the light getting into the water.
Food, test kits, and dechlor...a good sealing rubbermade able to fit on a top shelf or cabinet. Can't over feed if you can't get to the food.
No idea on how you are going with filters, but if you use a canister, I would put it in a 29 gal rubber made tote under the stand. Or an open valve a couple inches under the waterline on the intake side to prevent syphoning issues.