In India, most children go to play school around 3 years and regular school at the age of 4 years. Norms in other countries may be different. Children also differ in their readiness to go to school. Usually at three years a child benefits by going to play school, as it helps not just cognitive development, but also helps the child learn social skills.You should encourage your child to go regularly, because if you give in to his demand once or twice, he will get the message that he can avoid school if he whines.A calm discussion with your husband would help in understanding his reasons for not wanting the child to go to school. You should not make it an ego issue, as the child's welfare is at stake.Finally do ensure that the school environment is adequate, and there are qualified persons in charge of your child's education.