You will want to get many different sizes and styles of flat back charms. They have all different sizes and characters available. The larger sizes were nice to use to create a theme and then you can add the smaller ones to fill in.
Resin Flatback Embellishments
Michael’s is a great place to start gathering items to decorate. You can use glitter, mini clay pieces, mini beads and mini pearls.
Kits with multiple colors of cream glue are a great way to start. They often come with the tips to be able to create. Using the tubes takes a lot of practice. The bags are are easily to squeeze out. I practiced with icing.
Decoden Cream
Phone Charms/Chains
Hobby Lobby has become my go to find pretty beads for my phone chains.