What's in the background?

i LOVE photograhy, and was very excited and blessed to take a photography class by probably the best photographer in Tulsa -and an amazing person - last weekend who also goes to my church. I learned a ton and really trying to practice it this week! so...we headed out to woodward park for easter pictures. I'm very pleased with this picture - except for one thing...can you figure out what it is?


it "breaks" one of the basic "rules" of photography-"be aware of your background"-which i *thought* i had blurred or cropped out in the actual pic. cropping distorts the pic a little, but think that's what i'll have to do. the kids are still cute. :)