The sponge ball is a preparatory game for handball. Its main purpose is to love handball and practice regular exercise, to introduce the basic elements and rules of the game to children aged 7 to 10 years old.

The sponge ball is also shown as its name, and the children are played with no negative experience or injury to children.

Children aged 7 and 10 are classified in 3 age groups U7; U8-9; U-10;

The base material of the balls (covered sponge) is the same for all three age groups, but their nail size and weight are different.

U-7 diameter: 11.5-12.5 cm Weight: 80-90 gr
U8 - 9 diameter: 13.0 - 14.0 cm Weight: 100 - 130 gr
U-10 diameter: 15.0-16.0 cm Weight: 140-170 gr

The general feature of balls is good traction and rebound and long life.