Dream Big: As he watches birds fly overhead, Riff begins to daydream of flying. He decides to build his very own rocket ship and fly to Mars. The flight is not exactly a success, but Barney encourages him to never give up on his dream. Educational theme: Determination. That's What a Mommy Is: After seeing many moms playing with their kids in the park, Baby Bop is curious. She wonders what makes somebody a mommy. With Barney's help, she learns all about what makes mommies so special! Educational theme: Appreciating caregivers.