A comfort object, transitional object, or security blanket is an item used to provide psychological comfort, especially in unusual or unique situations, or at bedtime for small children. Among toddlers, comfort objects may take the form of a blanket, a stuffed animal, or 
a favorite toy, and may be referred to by (English-speaking) toddlers as blankey and lovey. Cuddly toys are sometimes carried in emergency vehicles and police patrol cars, to be given to children involved in an accident or traumatic event, to provide them comfort.
Comfort objects for therapy
Stuffed toys are sometimes equipped in emergency vehicles and police patrol cars, to be given to victims involved in an accident or traumatic shock, to provide them comfort. Paramedics are trained to treat physical shock with a wide array of blankets designed to preserve heat, blood, and wounds for life threatening traumas. 
Often charities will provide comfort objects such as blankets and quilts to victims of trauma. Psychologists are experimenting with the use of heavy thick fleece blankets to replace restraints such as straight jackets. They have noted through experiments with autistic children that weighted blankets have a desirable soothing 
effect to help calm agitated patients.
In child psychology
In human childhood development, the term transitional object is normally used. It is something, usually a physical object, which takes the place of the mother-child bond. Common examples include dolls, teddy bears or blankets. Donald Woods Winnicott introduced the concepts of transitional objects and transitional experience in reference to a particular developmental sequence. With ‗transition‘ Winnicott means an intermediate developmental phase between the psychic and external reality. In this ‗transitional space‘ we can find the ‗transitional object‘. When the young child begins to separate the ‗me‘ from the ‗not-me‘ and evolves from complete dependence to a stage of relative independence, it uses transitional objects. Infants see themselves and the mother as a
whole. In this phase the mother ‗brings the world‘ to the infant without delay which gives it a ‗moment of illusion‘, a belief that its own wish creates the object of its desire which brings with it a sense of satisfaction. Winnicott calls this subjective omnipotence. Alongside the subjective omnipotence of a child lies an objective reality, which constitutes the child‘s awareness of separateness between itself and desired objects. While the subjective omnipotence experience is one in which the child feels that its desires create satisfaction, the objective reality experience is one in which the child independently seeks out objects of desire. Later on the child comes to realize that the mother is separate from it through which it appears that the child has lost something. The child realizes that it is dependent on others and thus it loses the idea that it is independent, a realization which creates a difficult period and brings frustration and anxiety with it. In the end it is impossible that the mother is always there to ‗bring the world‘ to the baby, a
realization which has a powerful, somewhat painful, but ultimately constructive impact on the child. Through fantasizing about the object of its wishes the child will find comfort. A transitional object can be used in this process. The transitional object is often the first ‗not me‘ possession that really belongs to the child. This could be a real object like a blanket or a teddy bear, but other ‗objects‘, such as a melody or a word, can fulfill this role as well. This object represents all components of ‗mothering‘, and it means that the child itself is able to create what it needs as well. It enables the child to have a fantasized bond with the mother when she gradually separates for increasingly longer periods of time. The transitional object is important at the time of going to sleep and as a defence against...