While I generally agree with Lee-Bee, one question: does anyone on the co-op board actually care? Have they told you this, or did you look up the by-laws to make sure you were ok and found it? I ask because we live in a condo (townhouse) and it's in the by-laws that owners are not allowed to run businesses out of their homes. I think the rule was put in for things like doing hairdressing out of your house, which would create lots of traffic, etc. However, my neighbour was doing daycare before we moved in, and no one said anything. I recently joined the condo board (biggest mistake ever, it's like being back in high school!) and discovered that the board mostly turns a blind eye. I'm covered anyways because according to them, daycare is a "grey area" as I don't have a business number and I'm not a registered business. I run a legitimate daycare, issue receipts, follow the law, etc, but daycare providers aren't required to have a business number, so I can get away with saying that I'm not running a business, I'm "just babysitting." As much as I loathe that term, I'll use it if it means my neighbours won't jump down my throat.

It might be worth floating it past your co-op board, if they haven't specifically told you that you must follow the rule. If you're quiet about it, and you don't let your daycare kids destroy other people's property and such, they may just let it go.