3D/4D at 19-20 weeks??

Jenna
My mom will be visiting when I'm about 19-20 weeks. I'd like to set up an elective ultrasound for her to attend with me to see the baby (first grandchild excitement!). Does anyone have 3D or 4D photos in this time frame? Is it worth it that early? Or should I just go to a regular ultrasound place for her to see? Thanks so much!