If I hadn't wanted updates from the people, places and businesses that I Liked on Facebook, I wouldn't have clicked Like in the first place.

Facebook, apparently, doesn't agree.

For our second dedicated news post, we're taking a look at some new information about the possible causes of autism. With Playmate Jenny McCarthy getting press coverage for saying she knows what triggers the disease while various medical experts argue about its causes, it can be tough for parents to figure out who to listen to. While Time magazine recently reiterated that the study linking childhood vaccines to autism has been repeatedly debunked, its definitive cause remains a mystery.

However, some leading experts on autism, ADHD and learning disabilities have now published a list in the journal Environmental Health Perspectives of chemicals and heavy metals that they believe are more likely than even a genetic predisposition to trigger the onset of these diseases.

In addition to our regular posts about activities, we try to keep parents informed about topics that impact the lives of NYC families. Now, on top of our biweekly roundup of news links, keep an eye out for posts about relevant news pieces a few times a week.

Our first installment touches on the hot-button topic of PTA fund-raising. A recent New York Times article investigated the budgets of some PTAs that raise surprising amounts of money. It's not a simple issue. Read on to find out what they're earning and both sides of the story.

When my kids were toddlers, they must have thought that all I cared about were bathrooms, because every five minutes or so I would ask them, "Do you need to go? Are you sure you don't need to go? Why don't you just try to go?"

They were right in a way. Even though they're all school-age now, I still like to know where the nearest accessible bathroom is at all times when I'm walking around New York City. Now I've turned my obsession into a guide so you too can easily find public restrooms in NYC.

When kids learn about the history of slavery in the United States of America, it is, of course, taught with a great deal of gravitas. But this month, New York City families can experience the jubilation of emancipation at various Juneteenth celebrations that commemorate the abolition of slavery.

A combination of the words June and nineteenth, the holiday of African-American independence dates back to June 19, 1865, when Civil War General Gordon Granger arrived in Texas to claim the state for the Union and make sure the slaves were freed. (This was two and a half years after President Abraham Lincoln’s Emancipation Proclamation, believe it or not.) As of 2012, 41 states including New York recognize the occasion, and families can celebrate Juneteeth at various kid-friendly festivals and gatherings this month.

Although the average age for first-time mothers in the U.S. is mid-20s, many New York City women are on a different schedule. In the city, it's not uncommon to see thirty- and fortysomething moms proudly pushing strollers down the streets—often double ones. Becoming a mom later in life has many potential advantages, like maturity and financial security. But there are challenges too, like connecting with your peers. Sure, you can make plenty of mommy friends on the playground, but if you're hoping to meet other parents who grew up on Sesame Street before Elmo, you may want to join a specialized playgroup or meetup.

We previously posted about general parent groups in NYC. In honor of Salute to Moms 35+ Week, which runs May 13-19, we've rounded up some of New York City's best resources for mothers with a bit of life experience under their belts.

Yesterday, we shared some of our favorite train museums and other places for little choo-choo lovers in and near NYC. But hold on to your conductor hats: Today we've got details on a big bash in honor of National Train Day. This Saturday, May 12, families can head to New York City's most famous and fabulous station, Grand Central Terminal, to mark the 143rd anniversary of the creation of the nation's first transcontinental railroad with exhibits, hands-on activities and interactive displays. If your kid's into trains, you'll want to chug on by to this totally FREE event.

Ever since my brother showed my three kids all six Star Wars movies within a week (upsetting my husband, who felt they should have been forced to wait years in between like we did as children), they've harbored one career ambition: to become Jedis. So I guess it's no surprise that our family will be celebrating International Star Wars this Friday, May Fourth at a big lightsaber battle in Washington Square Park. As we fans like to say, "May the fourth be with you."

Of course, since we live in New York City, we don't need to limit our Rebel revelry to one day. NYC has more Star Wars attractions than "you can possibly imagine," as Obi-Wan Kenobi would say. Here's where you can get your Jedi on throughout the year.