In reply to NorthernGrit:
Despite what you say, for garden camping with kids, I’d go cheap. If you have a £30 Tesco tent (they are fine, I have an £18 Tesco tent for general camping, campsites, motorbike events), you wont be grumpy when children set fire to it, fall on it, etc, and it will last a few yrs looked after, or you can leave it in garden all dummer and ruin it.
That £30 protects yr investment in whatever “proper tent” you buy.