The Sig link you showed is only the main page, they don't link to each aircraft. Hopefully you were looking at the 1/5 scale cub, it is laser cut and a joy to build. You will find that the instructions and plans are well done and easy to follow, take the time to read them through a couple of times before you start. You gotten a lot of good suggestions about tools, with the sig kit all you need is a razor knife, drill set, a few small clamps, masking tape, rubber bands, and t pins. A good sturdy workbench is a plus, (the dinning room table has been substituted in the past) just don't get glue or paint on it, you will suffer for it. One thing that you need is a good building board, this can be made of balsa or acoustic tiles, I prefer the large Great Planes balsa one myself.
Take the time to look though the kit forum you will find many really sharp cub builds, along with a lot of good tips and suggestions.
Good luck with your build you will find it very rewarding to build one for yourself.