DAILY NEWS PHOTO/Carol Case

Tristan Taylor and his mother, Megan Taylor, admire his birthday cake at Cassidy Park Saturday. At age 3, Tristan was diagnosed with Asberger’s, and his social skills never developed properly, so his mother wanted to do something special for his 20th birthday. She reached out on Facebook, and the response was enormous. On Saturday, Tristan was treated to a huge birthday party featuring a monster truck, fire engines, motorcycles and plenty of new friends.