I had to find an attractive way to present city vocabulary to my younger students and I remembered bubbl which I had used a while ago, then forgotten. I had not been particularly excited about it and I thought it was rather limited regarding the formatting of the mind map. I still think so. And I am disappointed that it loses its elasticity when it is embedded. But it serves well for showing the colourful word clusters on the big screen.
I have also used it with my older students and I recall they really enjoyed playing with the tool because once they put something in it, it came alive in front of their eyes. They used to drag the bubbles around and watch them spring back, and I assume it was just another toy for them. Which it certainly is.
Here is what I made for my lesson.
Link to the mind map