Need a present for a junior and thought of these.
Prices seem to range from a tenner to £500. Can you get anything useful for £50?

I can’t give you much advice on them at that price but generally speaking you will get a better scope for your money than a similarly priced pair of goggles. I use them at work and the goggles are generally pants (£350 pair) compared to our similarly priced scopes.

Be warned. They eat batteries like they’re going out of fashion.