I understand tha these are available to buy (or rent) in Orlando. Are they called tracphones.....does anyone have any experience of them or something similar....we will be a party of six ..grand & grandma...mum and dad...and 2 young girls....it would be really good to split up at times ..to do diffeent things with the children but still be able to keep in touch...'specially to let mum and dad go off on some of the more wild rides