DAILY NEWS PHOTO/Carol Case

Tristan Taylor celebrated his 20th birthday Saturday at Cassidy Park. At age 3, Tristan was diagnosed with Asberger’s, and his social skills never developed properly, so his mother, Megan Taylor, 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.