Final answer:
A repeat performance refers to redoing or experiencing an event or action that already occurred, suggesting Bob is ready to recreate or revisit it for the kid.
Step-by-step explanation:
When Bob asks the kid if he wants a repeat performance, he is inquiring whether the kid would like to see or experience something again that has previously happened. This phrase suggests that there was an event or an action that occurred earlier and Bob is offering to recreate or revisit that same event or action. It might hint at a certain incident, a joke, a story, a trick, or any sort of display that the kid found enjoyable or noteworthy.