Model making is actually really quite fun and because it is made from paper, you just download the pieces and print them at home so you don't have to wait for postage. I found this model of Yoshi then spent the next two full weeks putting him together. You just print the pieces, cut them out with a craft knife, score them so they bend where you need them to then piece him together like a great big jigsaw puzzle.
Yoshi Model
Craft Knife
Very Fine Tip Stylus or Scoring Tool
Liquid Glue such as Mod Podge Matte (Matte glue is best in case it oozes out. Matte glue will not stay shiny)
Precision Tip Bottle (so you can squeeze out liquid glue in small areas)