If you don't have any edible glue on hand, there are several alternatives you can use to adhere decorations or parts of fondant together. One option is using simple syrup, which is made by dissolving equal parts sugar and water over low heat until fully combined. Once cooled, you can brush it onto the surfaces that need to be bonded and press them together firmly. Another alternative is using melted chocolate or candy melts as a glue substitute for heavier decorations or objects like cake pops. Simply melt the chocolate or candy melts in a microwave or double boiler, let it cool slightly, brush it on the desired areas, and press them together.