My 4 yr old screams her head off if she falls inside on the rug... yet my 1 yr old son can trip and fall on the wood floor, have a red bump on his head, and get up and keep going.
My girls were in foster care and have been adopted. My oldest B is 4 (she's been with us since 3 months) and my youngest L is almost 3 (she's been with us since 9 months). They don't remember their parents (both are drug addicts and know that if they 'clean up' they can see the girls, but it has...