If your front yard if flat you need 21 stones for each layer your would like to build. A typical retaining wall around a tree would require 3 layers. If your front yard has a grading, you have to see how many stones you need depending of the grading.
How much does it cost? As of 2010, the 4-day passes to Comic Con were $100 each. However, it increased as the years went by. According to WhenNerdsAttack.com, the 4-day pass with preview night costs $175 for adults and $87 for juniors, military and seniors.
Regular admission: Tickets, which include the theme park, the water park, miniature golf, Wild Bill Hiccup's Wild West Show, a magic show, a petting zoo and free sunscreen are $31.99, $27.99 for children less than 54 inches tall and ages 60 and older. Ages 2 and younger get in free. Parking is free.