Model a hot-air balloon. Your balloon should comprise at least these elements:
1).an envelope (that is, the fabric bag that contains the mass of hot air);
2).a basket or gondola suspended beneath the envelope that holds one or more passenger;and
3).a burner that sits between the basket and the envelope, used to heat the air that fills the envelope and produces lift.
Use textures or material properties to create a colorful envelope. In addition, create a landscape (perhaps using the ElevationGrid node) for your balloon to float over, and define a tour for your balloon over the landscape.