Go with friends who camp?
Do a short break ‘glamping’ in a ready set up tent?
To give your kids the camping experience I would not, personally, head to a ‘holiday park’ type site with loads of facilities, club, pool, EHU, carrying a ton of equipment.
I would do the opposite. Find a quiet ‘back to basics’ site with a natural setting and loads of space. One that allows campfires, and go for 3 nights.
Tent, mats, bedding, folding chairs, table, stove, cooking stuff, cooler. Portable BBQ.
Go out during the day, beach, castles, whatever. Get back to the site, BBQ or a one pot dinner on your stove, light the campfire, let the kids toast marshmallows.
If they love it this style of camping makes great weekend breaks. It makes camping the experience in itself rather than trying to recreate the home experience in a tent sitting on blow up sofas.