Best apps for a 7 year old?

[whatdayisitandotherquestions]

We're giving DD an Android tablet for her 7th birthday.

I'm going to pre-load some apps on it for her. Educational stuff and fun stuff.

What apps would you recommend? Thanks.

What's the name of the star gazer app? (It's going to be called star gazer now isn't it?! ).

A colleague had a brilliant version on her phone, and I downloaded what I thought was the same app but it was a bit rubbish, not the same thing at all.

Hopeful bump!