gas jar

i cant find the jar for the gas for the trolley

Hidden object in creep gingerbread house. Can only get it at certain level in game.

So this is weird but even though i have already done everything else there is to do, all i can find is the EMPTY jar, and not the gas jar. i have gone back to the gingerbread house several times, but i still cant find it.... please help me!!

Once u have the empty jar fill it with gas from the leaky pipe ( think it is in the basement not 100% sure)