Help! What bobbles/clips for DD's thick, wavy hair?

[Laundryangel]

DD starts reception on Monday and it suddenly occurred to me yesterday that not only does she have to have her shoulder length hair up for school but that it is going to have to stay up all day. Yesterday's bunches lasted about 45mins before a bobble came out; today's plaits lasted a bit longer but not much more than an hour. Over the years, I have tried the "normal" bobbles with gold thread running through them, towelling type ones, thicker "adult" ones and never had much success with any of them. Clips can only hold a few strands. What do I do? Cutting it so it is short enough not to have to tie it back won't work as then it just explodes out of her head!
Help!

No DC but I have hair like this.

i like scunchi bands, they are super strong so you can tie them extra tight.

Also put in mutliple bands, i generally use at least two for a ponytail

DD has had some success with cutting it to a chin length bob, with a bit of a layer to stop the pyramid effect.

Otherwise, try the ponytail but take kirby grips round it to back it up, put them in X's for maximum restraining power.

Could you do two ponytails (like bunches), then plait them tightly, and use these type of hairclips for flyaways? www.claires.es/12-pack-berrylicious-snap-clips/shop/fcp-product/29927

Also an Alice type band can be good for keeping it out of her eyes and she can put it back in herself.

Can you braid it. Two braids are better for staying in.

Invisibobbles work really well on my curly hair

I've always struggled to get things to stay in my long, thick hair, but have recently bought a few different hair grips/clips from this brand in Boots, and am really impressed:

m.boots.com/mt/www.boots.com/webapp/wcs/stores/servlet/CatalogSearchResultView?st=brand&brandId=3087&catalogId=11051&langId=-1&storeId=10052&page=1&un_jtt_redirect

Maybe there's something suitable in their range?

Spin pins
A flexi 8

Thank you for all of the suggestions. A range of things were bought today and I will try them all out in different combinations until we come up with something that works.

These little plasticky ones are great for kids - they don't look terribly inspiring, but you can make them very tight and they don't slip at all. really easy to work with. You get about a year's supply for £5, though Claire's and similar do cheaper own brand ones (don't know how strong they are, the Scunci onces are indestructible). Those ones I linked to are the tiny size but there are bigger ones if she really has a lot of hair.

(I say all this as a fellow hedge head )

A double bobble and kirby grips have got us through the first few days successfully. A couple of other girls are also resembling pin cushions. I've also noticed that a couple of them just have the front bit clipped back but think I will continue with all of her hair tied back as I want to minimise the risk of nits.