Both types of appliance are suitable for children. Removable plates have more effect on jaw growth, but they are bulkier, affect speech and are often not worn regularly, which undermines their effect. Aligners are better accepted, invisible and comfortable; they act more on the teeth and less on the jaws. Motivation for treatment with them is higher – but so is their price.
This answer is for general information. Your own case needs an examination by an orthodontist.