We have some great things around DFW.
I know it's unbearably hot, but the zoo is half priced on Wednesdays. We hit it up early and go in between the indoor and outdoor exhibits. It's usually not too bad of a trip. The animals do get a little lazy in the heat though.
The FW musuem of science is geared towards kids. They have the planetarium and imax theater if you are into that. They change out the exhibits rather frequently, so it's always changing. Right now they have Grossology going on. It's all about the gross stuff your body does. We have a membership. It's been money well spent for us. If you go and check it out and decide you want a membership, they will credit the entrance fee you paid toward your membership if you do it on the same day.
The aquarium in Fair Park is supposed to be great. You get to feed sting rays and check out sharks. We haven't been yet, but we plan on checking it out this week. The Dallas World Aquarium is also fantastic, but in my opinion, it is way over priced.
THe parks around here are terrific. We go early in the day. You still have to check the temp of the slides, even in the morning.
NRH2O and Hawaiian Falls are fun water parks. I prefer NRH20...it's just more convenient. CHeck online, both places have some good deals.
If you don't want a full blown water park Keller Pointe has a great indoor/outdoor pool with slide and a small lazy river. It's usually less crowded here than the water parks.
Urban Air in Southlake is lots of fun! It's an indoor trampoline park. We went before noon and it was great. The staff told me it does get a little more hectic and crowded after noon.
There are lots of bounce house places too - in NRH there's Leapin' Lizards, Keller had Let's Jump, and Southlake has Jump Zone.
THere is laser tag in N Richland Hills too. It's called Laser Quest.
Polar Ice at Grapevine Mills Mall has public skate times. Ice Skating would be fun with these 100 + degree temps!
They also have Legoland and the Sea L. Aquarium. I have been to Legoland and if she even has a passing interest in Legos it wil be a fun day. I have heard very mixed reviews of the aquarium at the mall.
You can tour the Bureau of Engraving and Printing in Fort Worth. It's a free tour, but the rules on what you can bring in are really strict. They show you how money is printed.
If you haven't been already, the stockyards are fun for an afternoon. TIme it around the cattledrive and spend the $5 to do the maze.
Don't forget things like picnics at the botanical gardens and trips to the library. Simple, but memorable.
Have a great summer!