Do you mean Bibbidi Bobbidi Boutique? If so, it's available to under 12s and reservations are a must it gets booked up pretty quick. You might get lucky though!
Take care on the age of your little ones. We have seen plenty of tears of made up 'Princesses' given the at times heavy makeup and severe hairstyles they adopt there. Plenty of smiles too but the tears were a shame to see x