Here are some links to great ideas.
About- 100 Fun Summer Ideas
The Frugal Girls- easy craft ideas
Keep Your Kids Busy for Under 10 Dollars from Buzz Feed
101 Fun Things To Do In The Summer from Parenting Magazine
Outdoor Summer Activities
Here is a list of some of the things we do in the summer.
Pick fruits- like strawberries, blueberries and cherries. We also go to the Farmers Market every week.
Go to the beach. With Lake Ontario right here, this is a fun day for us. Lots of exercise too.
Walk on the Erie Canal and look for edible plants and such.
Go to area parks- many parks around here offer different acitivites. There are water parks, parks with hiking trails, waterfalls, beaches...
We always go to one of the local farms called Springdale Farms. The kids get to see some of the operations of a farm, pet the animals in their petting zoo, run along the walkways...
Play in the backyard with water. Water guns, water baloons, slip and slide, sprinkler, whatever.
Go on little day trips to various things around Rochester.
Go to the zoo.
Go to the library and visit other libraries around Rochester.
Go to local museums.