If this about painting/drawing:
AutoDesk Sketchbook (which is free, if you do not need features like loadable brushes and others. if you need these, it’s 1.99 single payment),
Procreate (14.99 single payment).
Or if she wants to create vector and pixel -based designs:
Linearity Curve (I think it is now subscription based, but there is a free tier in which you can use it after registration with a limit on the number of documents you can work on(?)),
Amadine (9.99/year; depending on the age of your daughter as well as her school/college/uni - she might can use it under their free educational license),
Affinity Designer (19.99 single payment).
Procreate is arguably the first choice for pixel-based things (Sketchbook gives it a run for its money though). For mixed pixel/vector designs Affinity Designer has you covered. Both are a single investment. Otherwise Adobe offers a lot with their monthly subscription.