Chiko wants to be an inventor, but is worried it will be too difficult. Carlin reassures him that there are plenty of simple inventions that can really help people.
The crew is preparing for Olga's birthday party. Dokko is in charge of fireworks, but he's never made them before! He rushes to figure out the science behind them in time.
Eric learns that fossils are like fingerprints left behind by prehistoric plants or animals. He makes some modern-day fossils using toy dinosaurs and flour.