If you are looking for something to do on any given day, and you happen to be in Toronto, head down to the Toronto Island Ferry port, and get a RT ticket for $7.25 (subject to change, fees are based on 2015) and travel to Ward island.
The Rectory Cafe
Center Island is a popular destination, and with the Centerville Amusement park, water fountains, and the bicycle and boat rental stores it makes total sense that the line to that island is always the busiest. But Ward has its own beauty --it's more mature, and more reserved. You get off the ferry, and there is no sign or anything else to direct you or inhibit you from going in any direction. But, if I may suggest you may head towards the lake and start walking west toward the Center island. It's a lovely walk and doesn't take too long. Along the way, watch for the sign (on your left) for The Rectory Cafe. Don't think of leaving if you are hungry and there is a line; it's worth the wait, and the staff is quite accommodating and seats hungry clients quickly. The Salmon and Steak there are cooked to perfection. In the summer time, when we visited, August 16, there was quite a charming jazz musician singing beautiful tunes. It was a whole experience.
There is plenty to do after lunch. Continue with the walk to Center Island and explore the eastern point of the island via a rental boat or a bicycle.