We definetely want a longer summer with them but having said that your kid also needs his own space and personality developments. School is the best place for this. Try and make kid more independent and confident even without you. emotions and love will always be there and you will think, whats the matter if they spend some more time with us? But little things make big impact in schools (I am sure you remember your school days) So, let them go when it is the right time and try to be less selfish on this.