For children in this group, the standard approach of the clinic will be applied first. The researcher will apply scales to the child before the procedure, the Child-Parent Information Form to the parents, and the child, parent and independent observer before and after the procedure. The patient's physiological parameters will be recorded by the nurse performing the procedure before, during and after the procedure. The device, which is removed from the freezer just before the injection, will be applied by the researcher to the skin surface where the procedure will be performed for approximately 5-10 seconds before the injection, and then the injection will be performed.

For children in this group, the standard approach of the clinic will be applied first. The researcher will apply scales to the child before the procedure, the Child-Parent Information Form to the parents, and the child, parent and independent observer before and after the procedure. The patient's physiological parameters will be recorded by the nurse performing the procedure before, during and after the procedure. The device, which will be removed from the freezer just before the injection, will be placed by the researcher in contact with the skin, 3 to 5 cm above the injection site. Buzzy will be started 30-60 seconds before the process and will continue until the end of the process.

For children in this group, the standard approach of the clinic will be applied first. The researcher will apply scales to the child before the procedure, the Child-Parent Information Form to the parents, and the child, parent and independent observer before and after the procedure. The patient's physiological parameters will be recorded by the nurse performing the procedure before, during and after the procedure.

Before the procedure, the independent observer, parent and child will be informed by the researcher about the method that will be used in the selected group and the scales that they will score. For children and parents in each group, a standard approach will be applied. Single blinding (participants) will be used in the research and the researchers will not have information about the other group. Cold application will be applied to children in group number one (Coolsense group). Coolsense, which does not contain any chemicals, provides cold application with the metal piece on its tip. In group number two (Buzzy group), vibration and cold application will be applied to the children. Buzzy is a handheld device with a bee-shaped motor that creates a small cold pad and vibration in the area in contact with the skin surface. Group number three (control group) will continue the standard procedure of the clinic and no different application or approach will be applied.

It consists of facial expressions to evaluate pain intensity and is used in children aged four years and above. The scale consists of six simplified facial expressions that indicate the intensity of pain at increasing levels from 0 to 10 (0-2-4-6-8-10). In the scale, the child is asked to show the facial expression that best describes the intensity of pain. 0 means no pain, 10 means no pain indicates severe pain.

The scale used to evaluate the level of anxiety in children is a visual measurement tool that consists of five drawn facial expressions ranging from neutral expression (0 = no anxiety) to scared face (4 = severe anxiety) and receives a score of 0-4 points. As the score obtained from the scale increases, the severity of anxiety increases, and as the score decreases, anxiety decreases.