To build a Plinko board, gather a white pegboard, grooved dowel pins, poker chips and rubber bands. Cut the pegboard to the desired size of the Plinko board, install 13 rows of pegs with dowel pins in alternating fashion, and loop the rubber bands into triangles to create the path.
When installing the rows of pegs, alternate between 10 and nine rows. Then, loop rubber bands into a varied path of triangles. For example, loop the first rubber band around the first pegs in the first three rows and the second rubber band around rows three, four and five. This creates a path for the chips to fall. Continue this pattern. Label the board with a title and dollar amounts, and decorate as desired.