Zebra thinking is as high as s4. Zebra Thinking is an online AI interactive course product that provides systematic mathematical thinking learning for children aged 3-8 in China. Produced by ape tutor and invested by Tencent. Let children systematically learn six modules of knowledge, such as number sense and operation, figure and space, logic and law, time and planning, hands-on and puzzle, audio-visual and memory, in rich curriculum content and multi-sensory interaction. S 1 is suitable for 3-4 years old, s2 is suitable for 4-5 years old, s3 is suitable for 5-6 years old and s4 is suitable for 6-8 years old.