Below are instructions that I made, feel free to use them as you like.
Not all are designed by me

Build a Ball 3x3 with stand

Build a Ball 4x4
with one 2x4 plate and 2 1x2 plate
with four 2x2 plate corner

Build a Base 16x16

Build a Tree 1
Don't forget to braid the rigid hose and flexible hose (ziplines).

Base for a book
All green parts can be any colour you have/like, it will not show in the end result

Rebel Personnal Carrier
All green parts can be any colour you have/like, it will not show in the end result
All Sand Green parts can be changed. Colours I know have all the parts are:
Light Bluish Gray
Dark Bluish Gray
Dark Tan