Carefully crack a dozen or more eggs, preserving at least 3/4s of each shell. Good time to make some omelettes & pancakes. Note: keep egg-carton for saved shell storage.
Wash/clean interior of eggshells. Let dry..
Dye empty eggshells, let dry again. Fill shells with confetti and glue/top eggshell opening with colored tissue, sorta forming "cone-head shape".
Again, use egg-carton for shell storage until scattering/hiding the celebratory cascarones in yard for the kiddies/youngsters’ Easter Sunday egghunt.
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Finally, Let the kids enjoy breaking & smashing their Easter basket collection of celebratory confetti cascaron eggs on each other's heads!! Where?? Outdoors, not inside a residence.
Fun stuff. Messy stuff.
(*) Cascaron
\Cas`ca*ron"\, n. [Sp. cascar['o]n.] Lit., an eggshell; hence, an eggshell filled with confetti to be thrown during balls, carnivals, etc. [Western U. S.]
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.