Use resin in a project

If I can't find a silicone keychain mold, disposable gloves, or a mask, what can I use instead?

If you don't have a silicone keychain mold use a flexible silicone cupcake or candy mold in place of the 'Place the silicone keychain mold on the covered workspace' step, and substitute disposable gloves and a mask with nitrile or vinyl gloves plus a respirator rated for organic vapors or work outdoors following your resin kit instructions.

My resin has lots of bubbles or won't cure properly—what should I check and do differently?

Make sure you measure and pour the resin and hardener exactly as your resin kit instructions say, stir for the full 2–3 minutes scraping the sides and bottom, then briefly pass a heat source over or gently blow across the resin surface and use a toothpick to pop stubborn bubbles before the piece begins to cure.

How can I adapt this keychain project for younger children versus older kids or teens?

For younger kids let them place leaves or sprinkle glitter into the thin first layer while an adult handles measuring, stirring, and the heat pass, and for older kids (with supervision) let them mix and pour resin and finish sanding, buffing, and attaching the jump ring with small pliers as shown.

What are simple ways to personalize or improve the finished keychain beyond the basic steps?

To personalize and enhance the shine, embed tiny charms or colored resin dye into the initial thin layer before adding leaves or glitter, add a clear topcoat pour as a finish, then buff with a polishing cloth or apply a resin-specific gloss before attaching the jump ring and keychain ring.