The phrase indicating Tater Bug saving Conner from his boredom is when Conner teaches Tater Bug how to bend the ball into the goal, symbolizing a pivot to engaging play.
The figurative phrase that indicates Tater Bug will ultimately save Conner from his boredom can be found in the sentence where Conner begins to teach his brother how to bend the ball into the goal.
This phrase symbolizes the moment Conner finds a reprieve from his boredom through the unexpected joy of playing with his little brother.
It is the turning point where the mundane task of postcard writing is abandoned for the lively interaction with Tater Bug, pulling Conner into an active engagement and alleviating his boredom.