The library's annual program for young Master Builders invites the community to “Build a Better World” for this year’s challenge theme. Competitors also need to write a brief background story to display with their entry. One entry per participant is allowed in the contest for ages 4 to 13. Entries must be original designs (not a LEGO or compatible brand kit) built by the participant without adult assistance. Entries are limited to a 15-by-15 inch footprint. Judging is by age groups: 4-7, 8-10, and 11-13.