East Liberty-based Duolingo is taking early childhood education to new heights. The world’s leading mobile learning platform opened Duo’s Treehouse, a free, bilingual (Spanish and English) space designed for children aged 5 and under. Located in The Kingsley Association building in Larimer, near the company’s headquarters, it’s open on Fridays from 9:30 to 11:30 a.m. to provide inclusive play, programming, and support for local families.