This study will compare the efficiency of the iPad distraction or the administration of Nitrous Oxide on the anxiety decrease when a peripheral venous catheter is needed in children between 3 and 9 years old.

The study is aiming at demonstrating the efficacy of active distraction by an iPad on the anxiety consequent to venipuncture and insertion of a peripheral vein catheter. The comparator is nitrous oxide in a 50% mixture with oxygen that is routinely used for sedation during procedural pain. However, nitrous oxide has secondary effects particularly on the inhibition of Vitamin B12.

The primary outcome is anxiety scores. Secondary outcomes are pain scores and satisfaction of parents and health providers.

All children will have EMLA cream (mixture prilocaine and lidocaine) applied one hour prior to venous punction. Anxiety, pain and satisfaction scores will be recorded at baseline and then within an hour following the venipuncture and insertion of the peripheral vein catheter.

Inclusion Criteria:

• Venous track needed
• French mother tongue
• Age between 3 and 9 years old

Exclusion Criteria:

• Children with cognitive disorder (autism, metabolic disorders,
• Children with cerebral-motor disability
• Children who don't speak french
• Children with ADHD treatment
• Children with epilepsy
• Children who present contraindication to the use of Nitrous oxide