saving money on a niagara falls (canada) vacation?

i’m going to be going to niagara falls cananda next month. it will be 3 adults and 1 child (5yr old). i was interested in trying to save some money. i have been there once before and i remember buying a package type deal that included a ticket to the maid of the mist, the rapids walk, behind the falls, and a few other things. i was wondering if anyone could tell me where i could purchase something similar online or in niagara falls itself. any coupon deals for activities up there would be greatly appreciated! thanks for all the help!