Twelve-year-old Katie Vrieswyk, left, and Diomena Mercer, 11, work on building a website for the Sheridan Library Tweens during the Tween Challenge Takeover event Tuesday afternoon at the Sheridan County Fulmer Library. The childrens library is in the middle of a series of events focusing on tweens. Activities include stop motion animation, creative writing, computer coding and robotics. The events are held every Tuesday and Thursday through January and February after school. Justin Sheely | The Sheridan Press.