You're surprised that Bluepup remembers each tiny detail and time of various events. You never focus on those things, but at least someone does!
Bluepup almost felt guilty when he admitted that he could not find the toy this time, but Creampuff nodded in approval, and explained that it was because she did not actually hide anything during this lesson and it had been a test.
Bluepaw mentions that they left something for you nearby, adding that it will be quite useful. When you start to thank them, they leave without another word.