The scale will then be validated with a sample of 218 hospitalized children from 2 to 11 years old, to whom pain is usually evaluated in a systematic way. Children from 4 to 11 years old will have simultaneously the teddy scale, the VAS and the FPS-R. They will be asked to determine which scale they preferred. Children from 2 to 4 years old will have the teddy scale; the FLACC will be filled in by parents.