Splash Water Drop

MAGIC BOTTLE COMES INTO EFFECT!
Little Tom has a magic bottle which could generate magic water drops,and these water drops could connect with each other and finally vanish like it never exists. If Tom could successfully remove all water drops from the board,he would be rewarded with big surprise! However Tom is not that good at this magic puzzle game and you have to help him to achieve this. Rules are simply,let the water drops bump into each other and they will turn into a bigger one and the biggest will vanish and send out four small water drops in four directions. See if you can help Tom win his big surprise!