This project was free for me, as all these items were gifts, but they are all inexpensive. It's simple and easy to customize, and rubber animal you find at the dollar stores would work, and any color of paints. I hope to see YOURS versions!!!
And I sewed them together! The rubber of the flip flop was too thick for my needle to pierce through, so I made stitches on the bat and wrapped my thread around the strap a few times between each stitch.
And now for the fun part:
Just paint on as many layers as needed for your desired effect, (I did 3-4), letting dry between each layer. That's it! Definitely won't actually take an hour and your friends will be jealous xD