Christmas Lights!!! HELP!!!?

Ok, so right now our whole family is *frantic* because we have decided to go all out this year with outdoor decorations. We have this Santa sled that lights up and there are 3 presents in the back. The sled works, and two of the presents, but the third present, the green one, will not work! We noticed that there is a light missing and we can't find one single light that will fit into it! I have tried every light extra that I keep in a plastic bag. We think it may have fallen out and searched our shed, but no luck. Does anyone know anything that could work? Any tricks? I'm clueless! Thanks!