Adding hot glue to some parts and adding light to it (candle, LED, ect in the pumpkin) will make it glow better.
Step 1: You Will Need
jack o lantern
Step 2: Start Up
take hot glue (best color would be white or yellow) and for a tooth in the pumpkins mouth (rinse and repeat)
Step 3: Pumpkin, Hot Glue, (maybe LED)
now you'll make 2 eyes and a mouth
in basic terms make hot glue "shields" on the eyes, and the mouth
If you want to you can add a LED if your that good, it will light up the hot glue and make it cooler
In the video I only show how to make the eyes, but you will do the same process as with the eyes.
Step 4: DONE
Step 5: Me Talking, Pictures