Time Stream (Game show idea for NBC Kids)

Based on the French Game Show for kids, Les Mondes Fantastiques.

Premise
Four kids (aged 10 to 13) must band together to collect strange alien rocks in different worlds, and use them as time to be used in the Cavern of Dreams, where cash and prizes can be won.

Planets

 * Relsor - A small swamp planet filled with many unusual animals.