Advice on inflatable Stand Up Paddleboards

[warp9]

Hi. In short I want one. Never been on one, but they look great fun. I've got an image in my mind of putting my 6 year old on the front and going paddling round some sea coves on a calm day. Plan would be to put it in the camper and use when appropriate when we visit the coast. We're also spending nearly 3 weeks on the med in Croatia and Italy this summer.

What do I need to know? Would spend up to £500 on a half decent one, not concerned about speed, probably more about buoyancy weight and might be useful to have seats to clip in.
Cheers

[warp9]

Thanks for the comments guys, will go and have a nosey at Decathalon at the weekend.