Super simple craft idea, easy for kids and can be done for so many holidays/events. Just get canning jars (craft stores sell all sizes and shapes of clear glass jars). The glue whatever you'd like to the bottom, make small vignettes, personalized favors
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I love you clothes pins: Write a message with a FINE POINT sharpie so it doesn't smear. Write "I love you" on a paper. Cut it out, and hot glue it to the clothes pin end. Would be cute for a care package!