@Balloons R Us they will provide you with a balloon of your choice of color and insert inside it pink or blue confetti, which then you can just pop it.

Where can I find glow in the dark party supplies?

@Balloons R Us they have the sticks

Where can I find pre filled confetti balloons?

you can choose your own balloon and fill it with any confetti you want @Balloons R Us

Where can I find those big numbered balloons?

They have black, rose gold, silver, gold, pink, blue & red. One number costs 10 JD's and it's one meter. @Balloons R Us

Where can I buy Bunch O balloons (the thing that fills multiple balloons with water all at once)?

@Balloons R Us and the prices differ according to the balloon quality and quantity. But they sell them for sure

Where can I find the best balloon shops for special occasions, preferably with delivery outside Amman?

@Balloons R Us

Where can I buy balloons in bulk for a good price?

@Balloons R Us

Where can I rent a candy floss machine?

@Balloons R Us they have the machine for rent