Show this to your kids...
I am not a big fan of this sort of games but it may be a good opportunity to easily onboard some newbies to crypto ;-)
So if you want to get 2 completely free cryptokitties you have to install this ETH wallet:
It works more or less like metamask but you would have to register and verify an email as well as mobile number.
Then after you install Dapper go to https://www.cryptokitties.co/ and create an account there with Dapper. Then you will have an option to adopt two brand new cryptokitties for free (no ETH is necessary to collect them so they are 100% free)