I just started going to the pool and got some bubble rings going
To be honest I didn't think it was that hard, the difficult part is understanding how to do them.
But after you get it, it's like "OH, I geeettt ittt "
My only problem is that I have a tendency to flip upside down when I lay on the bottom of the pool <:'D
And as far as bubble hearts go, I just quickly blow air out of my mouth and into my hands and then make the shape of a heart with them.