Because it’s Monday you can now you can defeat the Sensei mascbot at the Beach!
Go to the Beach and click on the bot.
Sensei will tell you to retrieve a hair trimmer.
May? Pfft. Spoiler alert, they do.
Go back to the Beach, click the bot again, and complete the puzzle.
You’re then good to go with the Sensei mascbot and can collect your free item(s).