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Explore the basic physics of movement and rotation, Perfect for teamwork Set includes 5 gear wheel sizes with 6, 8, 10, 12 and 15 teeth Set of 400 pieces Age 4+, This set allows children to explore the basic physics of movement and rotation, including the effects of friction, creating power and how simple machines need and use gears. Perfect for teamwork due to the number of pieces and the set includes 5 gear wheel sizes with 6, 8, 10, 12 and 15 teeth - some with teeth in the central hole so they can be used as drive wheels, some with a smooth central hole to ease spinning. Each gear is marked clearly with its number of teeth to ensure that the user can easily find the right gear for each exercise, activity or model under construction.
