‘Dig! Plant! Grow!: Wake Up, Garden!’

No garden could stay asleep after all that exhortation. In the Ruth Rea Howell Family Garden at the New York Botanical Garden, children will help get things up and growing by sowing seeds, planting seedlings and spreading compost; they can also observe germinating seeds through magnifiers and microscopes. For a different take on outdoor exploration, the Bronx Arts Ensemble will present “Hansel and Gretel” on Saturday only. In this interactive concert, at noon and 1:30 p.m. in the Everett Children’s Adventure Garden, young visitors can become acquainted with the instruments of the orchestra at the same time that the piece’s hapless hero and heroine encounter the wicked witch.