Science for Kids: Overnight Crystal Garden - Babble Dabble Do (uses epsom salts) sleep-over mine craft party favor
Science for Kids: Crystal Suncatcher Craft with Epsom salt and hot water, ratio, and clear plastic lids
Cool Science for Kids: Growing Crystals (pipe cleaners, borax & hot water) in the shape of their name or snowflakes, starbursts.
popsicle stick snowflakes - I can picture these painted silver with rhinestones hanging in the windows with Christmas lights. And kids would love putting together the Popsicle stick snowflakes!