The DEMO version only includes 4 pages:
http://kodomonoasobi.com
http://kodomonoasobi.com/e/cm_lt1-_blank-bc1-FFFFFF-IS2-1-npa-1-bg1-FFFFFF-fc1-333333-lc1-E3343A-t-kodomoasobi-22-o-9-p-8-l-as1-m-amazon-f-ifr-ref-tf_til-asins-4901782878_ext_iframe.html
http://kodomonoasobi.com/kankeri.html
http://kodomonoasobi.com/kagefumioni.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
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