Android tablet stuff for 5 year olds - any pointers

[DSLiverpool]

I'm setting these up for my b/g twins on Sunday with enough for them to do so they don't bother me all the time.
They play with the iPads and watch you tube etc but don't do games abc stuff as I'm clueless - any gems I can download ?

[northwest monkey]

The Angry Birds series of games are very good as is Minion Rush. CBeebies app is fun although maybe a bit young.