Star Bombshell: Prep your stationLine a tray with parchment. Keep humidity under ~50% if you can. Make your baseUse your usual bath bomb mix and bind to a “wet sand” texture (squeeze and it holds, crumbles with a poke). Pack a thin shell (Half 1)Lightly fill the star mold half. Press the mix firmly up the walls to create a 5–8 mm shell with a hollow center. Scrape the rim flush. Unmold Half 1Tap the mold, lift off carefully, and set the shell on the tray. Repeat for Half 2Make a matching shell and unmold. Let the shells firm upAir-dry 20–60 minutes (or until they’re handleable without deforming). Add the surprise corePlace glitter, shimmer, embeds, and/or bath dust into one shell’s cavity. Keep contents below the rim so the halves can meet cleanly. Create a clean rimBrush crumbs off both rims. Add a super-thin ring of fresh mix around the rim or lightly mist the rims with 91–99% isopropyl alcohol or witch hazel as “glue.” (Some makers use a tiny bead of bath melt or MP soap instead.) Join the halvesAlign, press together firmly, and give a small twist to lock. Wipe the seam if needed. CureLeave on the tray to harden 24–48 hours (longer in humid rooms). Finish (optional)Dust the exterior with mica or shimmer. If you use glitter/mica, include Polysorbate 80 in your formula to help disperse color and reduce tub ring. Package & labelProtect from moisture; note any small parts inside if you sell to families with young kids. Troubleshooting quickies Seam cracks: rims too dry or uneven—re-mist and press again. Shells collapse: mix too wet or walls too thin—repack to 5–8 mm and let firm longer. Halves won’t stick: add a fresher, slightly wetter ring of mix or switch to bath-melt “glue.”
