We live close by, so the last week before school ended we got some Lola cupcakes went to the Demonstration garden, sat at the picnic table right outside the garden, had our cupcakes and the kids walked/ran around the garden.
While there, a Master Gardener lecture on floral arranging had just ended. As I understand it, Master Gardener has free lectures there on Tuesdays.
The garden is small yet pretty. I can't imagine tourists coming here but if you are in the neighborhood and want a nice picnic setting and a place for kids to get some fresh air for a bit, this is the place. There is a grassy area and one picnic table right outside the demo garden. During farm tour in the fall the Master Gardeners also have scarecrow making for the kids.
I would imagine this would be a great place for an artist to come and practice drawing plants and flowers since there is such a variety here.
We stayed about an hour and that was enough. there is no fee and the garden/parking is somewhat hidden behind a barn. If you head towards the pool in Ida Lee you will pass a barn on your right, right after the barn make a right and there is a small parking lot.