My little 7 y.o. boy is brilliant. He completely melted down, though, because he didn't correctly compute 16X16 in his head. We put math away for science fair and he's rusty on his multiplication skills. Because he forgot 6x6, thus leading to the wrong answer, he started crying that "I'm stupid, you don't love me, I'm the dumbest person in the world, I cannot do anything."

He was freaking out last night playing Apples to Apples if his selection wasn't picked as the "best answer," all with the same refrain: You don't love me. I'm stupid. I can't do anything.

Help. How do I teach him to manage feeling frustrated and to respond in a less emotionally catastrophic way?