16 Kid-Friendly Jar Projects for Parties, Holidays & Special Occasions Party in a Jar features sixteen kid-friendly craft projects that not only provide entertainment for pint-sized partygoers but also function as takehome party favors! From edible dino terrariums to holiday-themed gifts and centerpieces, these upcycled jar crafts are earth-friendly and sure to be the hit of your next get-together.