K'nex Planter
I love my K'nex and have been on a planter kick lately, so i decided to try and combine the two. :)
Green Onion Starters
just buy some green onions and place them in a glass of water. may take a week or two to get nice roots going.
Plant Onions
I stuck two in this little plastic pot.
Make K'nex Planter
this is the model turned upsidedown, so you can see how to build the base
Walls
pretty basic stuff, just make sure to cap off the ends so the four corner rods don't slip out.