Find cupcake liners with a cute design on the bottom. I found mine at Michael's for $1.00. There are LOTS of cute options out there.
Fill the jelly jars with your choice of candy and use a cupcake liner as the jar cover! Simply center the design and screw on the lid.
Wouldn't this be a cute gift?
If you wanted to do this for Valentine's Day,
Wilton has cute, themed cupcake liners!
You could fill the jars with red, pink, and white M&M's...