Hi Marge, Feel free to give us a call to discuss your needs. The Ultra Croc is not necessarily better for older kids. From our observations, older kids tend to hang out more in the pool areas, so the Crocodile Isle or even Hydro Rush may actually be a better choice due to larger lounge areas in those. The combo units with the bounce houses likely have bouncers that are too small for older kids, so that feature may be unnecessary if the Water Park is exclusively for older kids. Sincerely, Blast Zone Support