I have a 9 year old and a 4 year old, and we live 30 mins from town.
So we don't go in every day, it would cost too much, and take too long.
In the morning, we get up, and watch tv for about an hour, have breakfast, tidy up a little.
I turn off the tv, the kids play, while I do housework.
they play indoors, it's very hot here.
We may do a small craft for 30-60 mins, drawing, or painting etc.
We have lunch, then go swimming, this is our saving grace, we have a pool, and we swim for a few hours each afternoon. Then we come in and have a snack, and I start on our meal for the evening.
the summer is boring - for me, but my son loves being home and off school. Your kids are so close in age, they should be able to have so much fun together! I am a firm believer in just leaving them to it - they will find stuff to do. Our rule is no computer games unless it's dark outside, which forces them to play with each other. I do relax it sometimes though!
I wish sometimes we lived in a neighborhood with lots of friends for my son to play with, but I think that would bring it's own problems!