Spring Addition Game for Kids Online. Springtime sums is a didactic and interactive activity to practice simple addition and subtraction online. This math game is suitable for children from 5 years old, the age to practice easy addition and subtraction up to 10. You can change the range of numbers to practice addition and subtraction up to 10, up to 20, up to 100 and up to 1o00. To play this spring addition and subtraction game, drag the animal and plant or spring flower themed puzzle piece to the correct result of the math operation. Complete the entire spring puzzle with this free online interactive educational math game to play in the classroom or at home. This activity can also be used as homework, scoring exercises and as a complementary assessment method to the usual tests.