I agree with mon. A bit of a rest and some success is a positive thing. I hear your concern about really learning what it is like to be challenged and learn the skills (academic and personal) that they will need to meet that challenge but I think a bit of time to enjoy their current improvements may make them more willing to take on the challenges in the near future. It may also give you time to evaluate what areas you will advocate for them in the future - do they need a grade skip, a subject acceleration and which subject(s), and/or do they need more interpersonal challenges/experiences etc..
All in all sitting back for a bit will do you all good imho.
