Use websites and apps such as Skype, Google Hangouts, Facetime, and FlipGrid to make connections with students throughout the world.
Ideas:
Mystery Number - Two classes connect in real time and use yes or no questions to guess a number the other class has picked.
Meet Another Kindergartener - Make connections with Kindergarten classes ( or any other grade) throughout the country or world. Have a talk with them about their favorite books, recess games, and what they love about their school.
STEM Challenges - Two classes connect in real time and complete a STEM Challenge. After, students have the ability to debrief with a wider audience than just their classroom.
Climate Friends - Classes from two different climate zones meet and discuss how their climate effects their lives.
World Read Aloud Day - Don't just read aloud - read to another class somewhere in the country and let them read to you.