Time textbook
Σ ∀ ﾟ) σ This is a study aid for children,
σ (✪ω✪) children - the future master with unlimited possibilities,
to learn from different points of view, it can increase the multipoint branches of the brain's neurons (= ´ω` =)

[Continuous development]
Features of the current version:
1) Watch the movement of the hour hand by adding or subtracting "hours" to establish the concept of "1 hour, 2 hours, ..., 10 hours, 11 hours, 12 hours, 1 hour, 2 hours ... continuity",
2) The addition and subtraction buttons activate the vibrating function to improve the sense of touch and memory in children. Each time the cognitive capacity is increased or decreased by one hour, the finger of the clockwise turns one frame in the corresponding clockwise or counterclockwise.