We were at DTD earlier this month and spent a great evening there with friends. We planned to let our kids get wet in the sprinkler area, so they wore their bathing suits and we brought a change of clothes.
Check out the DJ guy while you're there, I think he's a regular. He was on the stage and we were all in the bleachers and he was playing some awesome classic songs and teaching the crowds how to dance!!! Fun fun fun for both adults and children alike!
Then our plan was to take a ride on the hot air balloon, but the winds were up and it was not operating that evening.

We even went back another day to try again, winds were high again! Oh well, we'll fit that in our next trip.
The
Lego store was great. My daughter (5) made her three little guys and had them proudly displayed in her little necklace case. They seem to be a wonderful souveniur to her from our trip there. The outdoor Lego area is alot of fun too.
We didn't eat at the T-Rex restaurant but the kids did go inside and do a dino/bone dig. Free!!! Ha ha, and they really liked it. You can pan for gems also, I think it's $5 or $10 for a bag of gems that you can pan for.
I had more fun there on this trip with our kids than on any other trip.