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25" on one side
UPC: 021196033801
8 string pens and 12 double-sided activity cards
heirloom-quality toy that will last for generationsCuriously attractivePerfect for those seeking toys supporting open-ended and unscripted play
Simple Machines Screw Pens 25" on one sideMPN: 005646 UPC: 895452001343 The screw, another of the simple machines, converts a circular motion (the turning of the screw) into a linear motion. It also lets you amplify the force a great deal, since turning the screw only moves the end of the screw a small amount. This classic wooden model offers children a basic concept of the laws of physics. Desktop sized. Key Features : i : Illustrate the principle behind the operation of a simple machine. ii
