how to be creative when it comes to little ones?

hello,
i`ve been teaching english for 3 years .i usually work with children from 5 to 12.
for older students i am creative in so many ways...i use many things to make the subject funny and easy to learn
but when it comes to 4 or 5 ,i run out of creativity !
they`re so full of new things that somtimes i feel i`m stuck in an other world and i dont have any clue how to go on!
i try to be energetic so we sing, we have lots of wrokshops,we paint and...but it`s never enough. the more i
do the more they want and
just then i feel desperate and helpless ! i cant find any thing else to do so they get bored and they start to do whatever they want.
honestly i have to let them to that or i`ll have THE headache for the next couple of hours.(the class is not useful anymore)
what can i do ?
i dont need any more worksheets or songs just a new method,any thing to help them and ME have fun while learning and teaching!
i dont want to make them run away from english (they will run from it when it`s time to go to school because it`s tought with the old old methods and its too boring)
do you have any suggestions ?
please let me know

thanks for yor time and your help ,
(in advance)