Tell us about yourself!
I'm not the author, but you'll need some sort of binder - that's what an egg or the flax in this case would do. You could probably sub in an egg if you're not being Vegan about it. I'm sure that there are other egg substitutes, but a quick Google search might be more helpful than me.
I used plywood as a base instead of cardboard, but followed this instructable pretty close. I stuffed the inside of it full of Fortnight figurines and I'm giving it to my 8 year old for Christmas.
Exploding Snap Deck
Say Goodbye to That Formica CounterTop!
The Bender Costume
Glow Wood Tree, Wall Decor