影片:https://www.youtube.com/watch?v=-8Nfd5GwoBA&feature=player_embedded 

This unique kit is fitted with four rotating tracks: one on each side of its body, plus one on each of its two arms. The arms themselves can also rotate gripping onto slopes or raised surfaces, and in doing so pulling the model along and allowing it to negotiate climbs and drops of up to 45mm.

• The kit includes everything needed for easy snap-fit/screw-together assembly.
• Features link type assembly tracks.
• Some simple wiring is required to complete the assembly.
• Features a rear stay to ensure that the Arm Crawler does not topple over when climbing higher obstacles.
• Switch comes pre-attached to motor.
• Requires one AA battery (not included).
• Can be combined with item 70097 Twin-Motor Gearbox and item 70102 2-Channel Remote Control Box.