Monocular for a junior

My daughter keeps asking to use my scope when she is shooting 30 or 40 yards. A scope seems a bit of an overkill but I agree that it is difficult to see where her tiny arrows have gone!

I thought a monocular might be better, less setup and should cover the distance.

I'm guessing a 10x25 would cover the distance.

I was thinking of something like the celestron nature 10x25 which is waterproof and about £35.

But then the cheapy ones caught my eye on eBay. They start at about £3 from China. Then there are some at around £10-£20.

Any thoughts on whether the cheap ones would be up to the job? Or any thoughts on the celestron nature one?

Thanks