Table 1. Demographic characteristics and age distribution of children participating in this study.

	Age	Kindergarten	Primary School	Male	Female	No. of Children
3	3.66 ± 0.2	27	0	16	11	27
4	4.44 ± 0.33	43	0	19	24	43
5	5.43 ± 0.28	49	0	29	20	49
6	6.36 ± 0.29	10	23	19	14	33
7	7.33 ± 0.28	0	21	10	11	21
8	8.45± 0.31	0	30	20	10	30
Total		129	74	113	90	203