This sounds like a cool thing to do, especially if your little ones are adventurous.
From their website:
Saturday, April 2nd from 10:00 A.M. – 2:00 P.M. FREE PROGRAM
A free extravaganza for the whole family awaits bird enthusiasts and nature lovers at the Trinity River Audubon Center. As the country looks toward Earth Day, Celebrate Bird Fest showcases the power and diversity of birds with an opportunity for children and adults to Meet Birds of Prey up close, Fly Homing Pigeons, Dissect Owl Pellets (What?), and take guided birding hikes. There will be craft stations to create bird art and learn about binoculars and spotting scopes! The celebration features an additional earth-friendly element as participants build bird houses and make bird feeders. More info.