Omg I used to be so obsessed with tie dye!! I even practiced tie-dye on regular sheets on paper.
Here is a step by step procedure if you are in interested in making this as well:
1. Take a piece of paper
2. Crumble + gather it up into a circle-looking shape (There are many ways you can crumble it depending on the style you want your tie-dye to look like, this is just the regular style (what tie-dye style usually looks like)
3. Grab as many elastics as you want (hair elastics also work) and section the circle into pizza slices (you can put as many elastics as you want)
4. Color the sections. Anything works in terms of coloring. however, markers work best.
5. Open it up! Your beautiful tie-dye is now done!