I like this two piece one, although a more traditional 2 piece tiger is shown in these YouTube videos: part 1 and part 2. There are pictures of some fierce paperfold tiger "faces" and masks online, if you don't think they would be too de-motivating.
You may also want to check out these dragon origami instructions.
(or if you need some tiger coloring pages to keep the youngest busy while you fold.)
For more see my Musical Mandarin Paperfolding entry.