Every trouble in a child's life is the result of something. Sometimes, simple unawareness in the childish psychology could cause many uncured psychological complexes and troubles. Every children psychologist suggests that it is better to prevent than to cure.
Away from home

The babies are used to be next to the mom, feel her presence all the time and see her in his/her field of vision. When they close eyes, they "lose" the mom and get anxious. A child, who is about to leave the native house for the first time, feels something like that. On the one hand, they are excited about the new kind of life and new friends. On the other hand, in a very short time they feel homesickness for the old home and old bed, the ordinary schedule. What's your role right now? Be sure that your child needs to be in another company and communicate to other kids. If your child is too worried about that, make the short periods out of home. For example, get him/her to the daytime camp for the infants. The kids used to follow the similar schedule like breakfast, games, daytime sleep, lunch or something like that. In evening you can get your child home and speak to him/her about the impressions. Later it will be possible to leave a kid away from home for a longer time. If you are going to bring your child to a summer camp, give him/her something which will remind about home, for example, teddy bear or the photos of yours. Tell your kid that you will be very glad to receive the call and speak in order to learn how he likes/dislikes the camp, teachers and children. If a child is still worried, a personal visit is needed. Look at the children, perhaps, your kid is able to get acquainted with somebody and get away of his/her inner troubles. Speak to the teachers and point out the direction of the child's behavior. But usually, the kids used to the new kind of life and do not wish to leave in the end of summer.
If you arrive to see your child, but he/she is too busy with games and new friends, but glad to meet you and tell everything about his/her news, so, it is splendid showing of the normal children development.