Visual processing disorder /laptop

[DancingDinosaur]

Not sure if this is the right place to post or not, but hopefully someone will have some advice.
My dd has been diagnosed with a visual processing disorder and hyper-mobility. She really struggles with writing. Because of this, it has been recommended that she uses a lap top for home and school so that she can get her ideas out more efficiently. The problem is shes only 7. What sort of laptop would be best? Obviously something light weight as she will be transporting it every day, but it needs to be robust. Because she's only 7! Arghh. Is it even possible to buy such a thing? Also, I need a child friendly program to learn touch typing. Any recommendations? Fingers crossed someone here has already been down the pitfalls of this path!!