What is the feel of the flooring? Considering it for a space that would have people walking, but also sitting, young children crawling on it, etc.

The Turf Tiles are good for people walking and sitting, but we wouldn't recommend it for young children crawling on it since it can be a little abrasive for them. To serve your purpose best, we recommend the 5/8" Soft Turf Tiles. These tiles are soft and non-abrasive, and also perforated so they would do a good job at draining as well if water is spilled on them.