pleasant, delightful, fun, enjoyable

happily

to turn over, to turn upside-down / to do a somersault (either forwards or backwards) / to be head over heels, to be in disarray, to be very confused

the act of turning something over or turning something upside-down / a somersault (either forwards or backwards)

to somersault

child

park

to turn something over, to turn something upside-down / to make someone or something do a somersault (either forwards or backwards)

plural of 子供: children

child's naive mind, child's juvenile mind