I got my nieces one of these for Christmas.
Ainol Novo 7 Aurora 2 £99.99, can be found cheaper but you have to order from china then, i opted for a few quid more to get from a UK supplier.
The reason i opted for that was it was a reletivly good spec for the money, but it does need tweaking, as such there is a very good community that do this over at slatedroid forums. Once u get an upto date tweaked rom on it they are good, not nexus good but not far off.
Only reason i would suggest this over the one you are looking at is the resolution is better, apart form that they are fairly similar, oh and never belive the cpu speed they state, its always slightly exaggerated lol.
I would advise what ever cheaper end tablet u opt for in the end would be to get a screen protector, the glass on the low end stuff is never that brilliant iv found.
One tip id suggest though would be to pop into your local purple shirted place, i know i know. Have a play with all the low end stuff and see what you would be comfortable with, if you would be comfortable using it, then the kids would. I did this and decided on the one i linked to as the specs where slightly better.
Best way to think about it is, anything dual core, with a half decent resolution that has access to the play store, be it native or with tweaking, is what u are after, as at the end of the day you won’t be using it. It took me ages to get it into my head that the one i bought was’nt for me lol.