king of textile - k'o-ssu narrates the technical process of k'o-ssu, which cannot replace manual work with mechanics ...
fire-proof asbestos cloth narrates one fire-proof cloth in the ancient times, namely asbestos cloth. asbestos cloth ...
a propitious beast of the silk road: lion narrates that the tribute lion in countries of the western regions has an i...
a treasury of artwork on the silk road talks about mogao grottoes, the location of dunhuang, which is an important st...
mom takes kaikai and xinxin for a walk in the evening and sees many fireflies fly in the air. mom narrates the specia...
kaikai sees the flying bird at the park, and wants to fly into the sky just like the bird. then mom tells him that bi...
through the dialogue between mom and xinxin in watering, it narrates how plants on earth obtain energy and survive th...
mom takes kaikai and xinxin to have fun at the park. kaikai and xinxin think that the air is very refreshing. therefo...
sacred-penalties of the ancient olympic games
sprint-the earliest offering to zeus
handsome muscles-characteristics of the ancient olympic games
throw higher and further-from the wood javelin to glide javelin
through dad's examination on kaikai's related knowledge about volcano, it explains the principle of volcanic eruption...
it narrates that in the spinning process of the hard-boiled egg, under the friction between the eggshell and the desk...
through the comparison of football and rubber ball made by kaikai and xinxin, it narrates related knowledge of object...
through the story where kaikai and xinxin find that the flight path is not a straight line where the balloon is leake...
how does a flush toilet work? how is water drawn from a fish tank? what is the principle behind siphon effect? let's ...
a microscope contains supporting, optical and adjustment parts. so what is the theory behind microscopes? let's find ...
nowadays, people tell time using their mobile phones. but before the electronic timing devices, people usually used p...
pianos are known as the "king of instruments". musicians can create impressive rhythms on these black and white keys....
volcanic eruption produces massive volcanic ash, due to which aircrafts will be grounded.
magnificent aurorae are created by three factors. what are they? let’s have a look!
how does lightning come into being? how powerful is it?
why do seeds hibernate?
why do people get drunk?
why do stars twinkle?
why do bananas change color?
how does a microwave oven work?
lead: come and have a look of dinosaur fossil with kaikai and xinxin at china science and technology museum! there is...
lead: the earthquake is horrible! what should we do if an earthquake happens? mom's teaching kaikai and xinxin how to...
lead: swimming is a popular sport among kids. there are several safety musts that can ensure people swim happily and ...
lead: really want to go hiking. but it's said that the insects like wasps and ticks in the field are dangerous. how t...
through dad's introduction of astronauts' space life to kaikai, it narrates that astronauts do not work and live at e...
through the discussion between dad and kaikai about the solar system in the science and technology museum, it narrate...
through dad's and kaikai's seeing exhibited items of the emission center in science and technology museum, it narrate...
it narrates the protecting role of the moon (it has been accompanying the earth since the ancient times) for the eart...
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