Dailies | ‘Little Couple’ Preview: Will's First US Birthday Ends on the Right Track (Exclusive Video)

The TLC stars serve up a post-party treat for their adopted son

Will's fourth birthday is the focus of Tuesday's episode of TLC's “The Little Couple.”

As viewers saw on last week's episode, proud parents Bill Klein and Jen Arnold want to give their new son an unforgettable day for his first birthday since moving to the United States from China.

See video: ‘Little Couple’ Preview: Will Goes to Work With Dad While the Girls Plot (Exclusive)

Will's parents ordered a custom-made cake, rented a party room at the zoo and planned a bunch of fun activities. But, everyone knows the celebration doesn't end with the party – it ends with the after party.

In TheWrap's exclusive sneak peek, Bill and Jen move the party to a second location in order to end the day with a fun surprise for their son, who loves all means of transportation.

Hint: The final activity is definitely on the right track.

Watch the video above.