math game free for kids

The game add, subtract for children.
The game basic addition number subtraction number for the child.
Start number addition and subtraction for young, single digit double digits.
There are several levels, brain, preparation before the class.
Suitable for children before school, children can play on their own, or the whole family fun for children aged 3-6 years. A positive number negative number basic, simple.
Playing games by touching and dragging and dropping. On the equipment.
And open the treasure box, which depends on luck, too. Which will be able to open the treasure box. The children will be tested by positive or negative number first.
Have fun with everyone in the family, now free.