Table 7 Classification of user demand points and satisfaction coefficients of children’s literacy toys”.

Demand points	Number of persons/					Better(SI)	\|Worse\|(DSI)	Type of Requirement
Demand points	A	o	M	I	R	Better(SI)	\|Worse\|(DSI)	Type of Requirement
Word bank for preschoolers	32	37	85	20	0	0.397	0.701	Must-be requirement(M)
Regularized literacy sequences	25	42	80	27	0	0.385	0.701	Must-be requirement(M)
Recognizing chinese characters in multiple dimensions	49	51	59	15	0	0.575	0.632	One-dimensional requirement(O)
Literacy can be applied after learning	20	37	92	25	0	0.328	0.741	Must-be requirement(M)
Easy learning without the burden	32	48	76	18	0	0.460	0.713	Must-be requirement(M)
Safety and high quality	32	24	113	5	0	0.322	0.787	Must-be requirement(M)
Interesting enough to attract children	22	24	109	19	0	0.264	0.764	Must-be requirement(M)
Exercise thinking and hands-on skills	110	26	25	14	0	0.782	0.293	Attractive requirement
Easy to review and recap	49	52	59	14	0	0.580	0.638	One-dimensional requirement(O)
Appropriate quality and quantity of Chinese characters	29	25	95	23	2	0.310	0.689	Must-be requirement(M)
Parents become protagonists in teaching their children literacy	32	48	38	56	0	0.459	0.494	indifferent requirement
The child has to give immediate and correct feedback to the parents.	30	33	93	18	0	0.362	0.724	Must-be requirement(M)
Parents and children can participate in the play together	108	28	25	12	1	0.782	0.305	Attractive requirement
Mechanisms by which parents can reward their children accordingly	34	40	44	56	0	0.425	0.483	indifferent requirement
Children need to have ways to share their learning with their parents	42	60	50	22	0	0.586	0.632	One-dimensional requirement(O)

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