A wall (Read 1200 times)

 The fact that we are usually born with a fear of heights tells me that I'm not supposed to get myself into predicaments where I could go plunging to my death.

since I recieved an A in my 1-credit child development course 20 years ago I will draw on my vast knowledge from that course and tell you that children crawling over clear panels do not develop a fear on falling until close to 1 year in age.