John Hi John, the "+1" accounts have been removed a long time ago. Nowadays, bunq has introduced new cheaper stand-alone plans (Easy Bank) that also include a full bank account for the same price.
Therefore, if your question is: "Do I, as a parent, also need a paid account in order for my child to have their own bunq account?", then the answer would be "No. Your child can have their own account. You don't need a paid account, the Easy Savings plan is enough for the parent."
Make sure to read all the information in the article here: https://together.bunq.com/d/2961