3pigs - on the last thread you asked about tablets for dc aged 5-7. Last year I bought Kurio tablets for my dc (then 8 and 5).
I got them on the amazon black Friday deals for £45 instead of £150. Not sure they were worth £150 but a steal at £45. They're about iPad mini size; there's also iPhone and iPad approximate sized ones.
I did see other places have them on offer for about £60 which is still good value, not least because they are proper android tablets, come with loads of apps (both games and educational) pre-loaded, have a shock absorbing cover that they come with (lots you have to buy the separately), you can set up different users on them with different profiles so you could use it as a normal android tablet whilst your dc would have just their apps, limited Internet access and you can set time limits on usage (either use for 20 minutes say or between 4pm and6pm only).
My dc love them, I can now use my iPad again without having to fight for it and I can recommend them.
They were also available with good reductions in various other places like toys r us, Argos, tesco etc so keep a good look out especially in that black Friday week.
Whatever sort you get make sure you can get a decent rugged case for it!