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Your search for "science" revealed the following:

CIC21535 Science Discovery Wired Control Robot Arm


Build it yourself Robot Arm kit. Uses simple household tools. Require 4 D batteries (not included) Maximum lift 100g.

CIC21633 Science Discovery Floating Magnetic Train


Magnetic train "floats" over the track, using magnetic attraction and repulsion to move. Assembly kit, uses 2 X AA Batteries...

Science Discovery Salt Water Powered Vehicles


A variety of assemble yourself vehicles that move, powered by salt water.

CIC21632 Science Discovery Hydraulic Robot Arm


6 axes of movement. Gripper opens to 1.89", rotates 180 degrees. Wrist turns 98 degrees, elbow 44 degrees, lifts 50g....