After dragging Evie around to look at boring old plants at the sale, we took her over to a children's natural play area at the arboretum. Next to the play area is a building with an attached greenhouse that houses mostly tropical plants. We walked through the greenhouse (they provide water bottles for kids to help water the plants), then headed out into the play area.
Before leaving the arboretum, I could not resist a quick tour through the tulip garden area. Not all of the tulips were open yet, but some of them were.