L.G.
This one might be a bit far but Friday mornings this summer at Denton Water Works are for story time. It's free from 10 to 10:45. They will read the kids a book and then they get a few minutes of splash time. You have to pay if you want to stay longer.
Also try your local library for free activities. I know ours offers story time, reading workshops, movie days and lots of activities all summer long.