Hello ! To continue with Ninie, you need to go back to her room at night (by giving her a vegebubble on the same day and going to bed at night), and unlock the next part of the animated scene by breaking the ice. By doing that, Ninie will want to talk to you the next day. Note that you might get stuck later in the storyline due to a bug in the tips. It will say 'Ninie is delighted about the Vegebubbles,' but you actually need to give her a level 5 or 6 vegebubble (Mirable or Zynkable) if you haven't already done so before. This issue will be fixed in the next update.