If there is such an effect, it will be sold in the Poptropica Store.
You have to finish the comic for the guy.
you find all the missing comic pages give it to the guy in klassic komix and he will give you the gum
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You have to get all of the comic pieces and then give it to the guy in the comic shop. He will reward you with Gum. Hope this helps!
Various types of gum effects (some free) appear in the Poptropica Store. However, chewing gum figures prominently in the quest on Big Nate Island. Costume gum will not work. You need to assemble the missing comic strip pieces to get gum from the Comic Book shop. (see related question)
Chew the bubble gum and to get the bubble gum you must find all the pieces on the comic and give it to the comic guy in that shop
In big nate island, find all the missing comic pieces and then give it to the guy who wants it.
On Big Nate's island
you have to get bubble gum and chew it in the school
Chew gum in school.
You get it from the store.
chew bubble gum in the school