I have been "switching up" who gets what puzzle (Curri was better at Twister and Sugar had mastered The Brick)
 
In 4 days....they each have mastered the opposing puzzles 
 
  
  
 
Twister still has a few more levels of difficulty but I don't think I am going to go there yet. 
so proud of my little Einsteins!! 
 
  
 