1, range. The object of Jelika's thinking and brain power is to train children aged 3 to 6. HABA thinking is suitable for children aged 2- 12.

2. significance. Jelika thinking cultivates children's autonomous learning ability and the habit of actively observing, thinking, judging and executing problems. HABA thinking can cultivate children's concentration, memory, observation and reaction, and cultivate their strategic thinking ability, mathematical thinking ability and creative thinking ability.