This is probably the most challenging game I have right now. Fill the glass by drawing lines to help the liquid go in the right direction. Really enjoyable game. Each level gets more challenging. Wonderful game for the mind and kids.
It is free to play in return for ads from sponsors. In this game you draw a line between where the water is going and the glass to fill the glass and go to the next level. This is very fun and is simple enough for all ages.
Go to Google Play Store to get the app.
Here is the link: