Dean accidentally breaks his brother's xylophone, so the group searches the sandbox for sounds that can replace the lost key.
Cal brings a globe to the sandbox, and the gang learns about countries, climate and the equator. The characters learn to appreciate where their friends come from.
Zen brings a planter to the sandbox, and the gang learns about how fruits and vegetables grow from the ground.
The gang uses the wheels from Earl's broken car to imagine themselves in all sorts of different vehicles.
After throwing a party in the sandbox, Neptune and Opus show everybody how to clean up and take care of the sandbox and the planet.
When a storm comes, the gang seeks shelter and learns about how hail works. Zen's favorite part of the storm is the rainbow that comes afterwards.
Neptune decides to eat only cupcakes, until Dean teaches him about the value of a balanced diet. Neptune decides he wants to eat a variety of delicious foods.
Patch finds a mirror in the sandbox, and the group learns the difference between seeing someone's outside and inside.
Roxy and Dean bet about whether Dean's sandcastle is made up from shapes, or just from sand. Dean loses the opportunity to live in Roxy's birdnest, but takes it well.
It's the first annunal musical performance in the sandbox, and the gang learns about how instruments work together to create music.
