and that's a picture of their cat, loki, flying high.e time the white house so impressed, they got an invite from president obama. what was that like when your dad got the call? could your family believe it and what did you tell the president when you got there? >> when dad got the call, it was the day before april fools' day. and the call was something like, hi, it's the white house speaking. and dad said something like, april fools' day is tomorrow. >> reporter: they went to the white house and showed off their invention. and this week, they'll be in glendo, wyoming, in the path of totality. and their data, they're going to share with nasa. what do they want to be when they grow up? >> i wanted to be robotic engineer. >> reporter: her older sister not sure yet. but she does have advice for other girls their age. >> don't give up, just keep on going and persevere, keep on trying. >> our coverage of the eclipse begins at 1:00 p.m. eastern. rob, how is it looking as far as cloud cover? >> coast to coast, clear skies will be ideal. but loo