Help please for 10 yo DD smart casual outfit needed

[MrsPnut]

My DD has two events to attend where she needs to dress up a bit, except she doesn't do skirts or dresses at all ever!

Previously she has worn boys chinos with a boys shirt and tie, and last year she wore a lovely jumpsuit but as she is getting more curvy she doesn't really fit into boys clothes anymore.
She mostly lives in jeans and skinny joggers (we stocked up in Benetton last time we were abroad) along with t shirts and hoodies.

Please help me find something suitable, she wants either a smartish top and trousers or a jumpsuit but everything I've shown her has been met with a shrug and a "don't know".
Budget is probably up to £70 for the outfit especially if she can get a reasonable amount of wear out of it.

[MrsPnut]

I should have said, she needs age 12-13 clothing due to being 159cm tall.

[ThenBellaDidSomethingVeryKind]

A blazer with something? Maybe skinny jeans and a sparkly top? Not sure what the events are so these suggestions may be a bit casual?

[EduCated]

Black playsuit

Ted Baker playsuit that looks more like trousers

Navy and white

[FauxFox]

Monsoon have a few nice jumpsuits in - maybe try there?

[EduCated]

Textured jeggings - could look quite smart with a nice top and a blazer, maybe a Breton stripe type top?

[EduCated]

Is something like this too fussy?

Floral blazer

Plain white

[MrsPnut]

Thank you so much, I think she's going to go for the white blazer with a Breton t shirt underneath and a pair of jeans she already owns.
The events are a presentation evening for a sport she does and also the year 6 leavers disco.
Now we just need to find shoes. Maybe sparkly converse?

[EduCated]

Sparkly converse would be fab!

[Lucked]

Sounds like a great outfit