Choose from a selection of books and activity sheets for self-directed discovery. Story book-bags contain a nature themed book and an activity. Backpacks are made for sharing and contain materials for a morning of fun for families or old and new friends. FREE; self-guided. Camp Winter-Break, Feb. 15–19. Visit the Botanical Gardens during the school winter break for guided activities and do-it-yourself fun. All guided programs 10 am-noon. Camp Winter-Break, Feb. 15–19. Visit the Botanical Gardens during the school winter break for guided activities and do-it-yourself fun. All guided programs 10 am-noon. Note: Backpacks also available for check out at the Matthaei front desk throughout winter break (Feb. 15–19).