When I was younger, I spent a lot of time visiting my grandparents at their home on Ahmic Lake. They had many different bird feeders for many different kinds of birds, and bird watching in the winter was particularly interesting.
Now, we definitely don't have the extensive bird feeders that they did (and still do now that they've moved into Parry Sound), I did learn a thing or two about feeding birds from those days, like how Blue Jays are very social, even friendly birds, and absolutely love peanuts.
If you want Blue Jays to flock to your house, go out and grab a bag of peanuts in the shell. Toss a handful out every so often, and call out to the birds - I have my kids yell out, "hey, Jays!". Pretty soon, you'll have Blue Jays flitting about, and they will come and call to YOU, eventually. They are bold birds.
On these bitterly cold, but brilliantly sunny days, making new bird friends has been an activity my little kids have loved, even if their yelling at the birds through the windows makes it near impossible to get a decent photo.