Has anyone tried "paint by numbers" murals?

[MediumEnglisch]

Has anyone tried paint by numbers www.sleepyheadsmailorder.co.uk/paint-by-numbers-childrens-wall-mural---motocross-riders-40-p.asp
all murals for kids' bedrooms?

We have "textured" walls (breeze blocks painted white) so wall stickers don't work very well - have tried before and they tend to come off after a week or two.

Thanks for any tips!

They're quite expensive so would live a recommendation (for or against)? Is a simple one colour stencil better?

This is what I've been looking at:

Oops silly phone! That post went strangely wrong! Was trying to link this at the bottom as an example of what I'm asking about
www.sleepyheadsmailorder.co.uk/paint-by-numbers-childrens-wall-mural---motocross-riders-40-p.asp

Ooooh what a good idea. Perfect for those walls aren't flat.