But for the effort-praised kids, the difficulty was simply an indication that they had to put in more effort, not a sign of failure or a reflection of their poor intellect. Perhaps most importantly, the two mindsets also impacted the kids’ level of enjoyment — everyone enjoyed the first round of easier questions, which most kids got right, but as soon as the questions got more challenging, the ability-praised kids no longer had any fun, while the effort-praised ones not only still enjoyed the problems but even said that the more challenging, the more fun. The latter also had significant improvements in their performance as the problems got harder, while the former kept getting worse and worse, as if discouraged by their own success-or-failure mindset.