Kids that age are more interested in stuffed animals or just playing with toys. It's an age where kids can be at vastly different levels depending on upbringing and it should be up to parents to determine if they think their kids are ready to learn about sex at the kindergarden level.
How about parental rights? and let's just let kids be kids until Psaki is given further notice? Seems to me the public school system has done a sub par job in teaching reading, math and science so maybe they can spend a little more time and effort there before deciding to F up something else.