Grab your electric balloon pump, balloon knotter and all the green balloons. Blow up all the green balloons.
Get the balloon arch kit. Fill up the bases with sand or water. (If you are transporting the arch from inside to outside, you can wait on filling the bases till they get to their final destination.) Next grab some tape and the connecting tube for the arch. Tape every metal part where it can pop out. The connecting tube is like a tent poll, and I found it helpful to tape down all the parts that can pop out on both sides so it doesn't pop out later if needed to transport or while putting it together.
Next grab the balloon rings from the arch kit. (These are the small circles with 4 notches in them.) Start by putting 4 for the same green balloons on each ring. Do this till the green balloons are all on a balloon ring.
Now for the fun part! Time to start creating the arch. Start adding the green balloon rings to the connecting tube by putting the connecting tube through the hole of the balloon ring with the balloons on them. Start with two dark green and one lime green and continue that pattern until the connecting tube can't fit anymore on it.
For this next step it's helpful to have a buddy. Put the end caps on the connecting tub and start to bend it in a U shape to insert into the bases. Once the end caps are in the base, your arch should be up! Wahoo! Take a look at it, if needed add more green balloons.