also- you could also do some Easter themed items! Bunnies, eggs, kittens, carrots
For St. Patrickās Day theme you could make rainbow things and leprechaun plushies!
if youāre okay with paid (also kind of big), thereās this:
and @WalktoCrochet has a popping leprechaun pattern! (sorry i donāt rly have st. patrickās patterns, let alone free ones- gl with your market tho!!)