Model toy-style mechanism design, cool appearance, six-axis joint robot arm, no battery required, using "Pascal's principle" to control the arm movement only by adding water! Learning knowledge by doing: green energy driving force: hydraulic pressure, principle of mass conservation.

★ Scientific principle: Pascal's principle
★ Power source: hydraulic power
★ Applicable age: over 10 years old
★ Assembly time: 3HR
★ Difficulty: ★★★★☆
★ Origin: Made in Taiwan, designed in Taiwan