Ugears Curvimeter STEM LAB ★Mechanical 3D Puzzle Kit Model Toys Gift Present Birthday Xmas Christmas Kids Adults tools This wooden model kit can

This wooden model kit can be customized to create a unique masterpiece

Ravenclaw™

The model is traditionally equipped by a rubber-band motor that powers the mechanism and drives the car

From 1997 to the present there have been six different Mars rovers operating on the red planet

Use a fan to demonstrate to your kids how real windmills operate

Ugears Curvimeter STEM LAB ★Mechanical 3D Puzzle Kit Model Toys Gift Present Birthday Xmas Christmas Kids Adults tools This wooden model kit canThe Curvimeter or opisometer is a device that measures the length of curved lines and helps to calculate the distance between the points on a map more precisely than a ruler or a compass. The mechanism has a measuring wheel, a clock face, and a hand. When the wheel moves along the line on a map that you need to measure, the hand moves around the clock face marked with measuring units centimeters, inches, etc. All you need to do in the end is to check