The minimum age of Dream Village Festival is 18. If there is any doubt the security is obliged to ask your ID. If you're not able to show your ID, access can be denied. So be sure to bring a valid ID, drivers license or passport to avoid disappointment.
On Sunday Dream Village will be accessible for 12+, but only under the guidance of a person of 21 years or older. In this case you both have to show your ID.