The JP Explorer will be ideal, but looks like it does not have a soft EVA foam deck, so the kids might trash it. If that is the case (no softdeck) it will be tops for
you - but modern boards are nowhere near as durable as what you'd be used to from the old days.
Given the high cost of a new

or recently secondhand JP Explorer, plus your wishing to use it for the kids to sail/SUP etc on, I'd strongly suggest a secondhand learner board like a Starboard Go (150L to 180L size, probably the former as you know what you're doing).
They're way cheaper seconghand, much more durable, and if you want to get back into it you may well only do a few months on it before wanting your small fast freeride board