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This interaction demonstrates a gamified slider used for measurement learning. The user drags a yellow pointer along a ruler, which dynamically fills with yellow to represent the selected value. Upon tapping the check button, a correct answer triggers a delightful transition: the entire slider and ruler turn green, a circular pulse radiates outward from the selected point, and the mascot character celebrates with a colorful aura and bounce. The top progress bar also fills smoothly, reinforcing the sense of achievement.
