I've been taking the 3 younger kids out for the summer so we don't drive each other insane. Luckily for us there is a great one in the next city over.
We've been going while Big M was in camp so this is the first time for him. He said he is too old for it though so I let him stay in the children's section. He occupied his time by researching Japanese military planes.
There is a room across the story time room that was filled up with toys for open play so the younger kids enjoyed that too.