It's noteworthy to mention how differently our children react to touching grass. There is something disconcerting about a thousand little blades touching your bare legs and arms. Steven was so terrified by the event that he would cry and refuse to crawl when placed in the middle of the lawn. I can remember him crawling across my folks' rough, rough sidewalk rather than brave a shortcut across the grass.
Mimi, when laid on her back, is frozen with sensory overload. We tried flipping her over, and she was pretty good . . .
. . . for a while :)