1)On תענית אסתר, there’s a מנהג to give 3 half shekel coins (מחצית השקל), to commemorate the מחצית השקל which would be collected during the month of אדר. 🎭🪙
2)You give 3 halves of whatever the currency is where you live- it’s hard to find half coins these days, so you should give a few dollars, and then pick up the coins that most shuls will have and say זכר
מחצית השקל 🥉