This event is in the "Youth" group This event is in the "Preschool" group This event is in the "Kindergarten" group This event is in the "Elementary School" group This event is in the "Middle School" group Jar Challenge All Day 5/18–5/31 Youth, Preschool, Kindergarten, Elementary School, Middle School Ongoing / Continuous This event is in the "Youth" group This event is in the "Preschool" group This event is in the "Kindergarten" group This event is in the "Elementary School" group This event is in the "Middle School" group May 18 - 31 2026 Jar Challenge All Day 5/18–5/31 Ongoing / Continuous Library Branch: Bartlett Public Library District Room: Youth Services Department Age Group: Youth, Preschool, Kindergarten, Elementary School, Middle School Program Type: Ongoing / Continuous Event Details: Guess how many items are in the jar at the Youth Services Desk for your chance to win a prize. You can submit one guess per week.