If had the spare btc right now I'd buy a set for my toddlers.
If you're short on BTC, you can hire someone to 3D print the toy using the files on the github: http://github.com/smeagol-gollum/TowersOfCryptocurrency
Makexyz accepts bitcoin for 3D prints. (http://makexyz.com) You can hire someone local to save on shipping, too.
If you write a 50-word review of the toy, you then can receive 6 shares of devcoins, which you can either sell or hold for the future. (big changes are coming to DVC, like decentralized voting). 6 shares ~ $80
More info here: http://coinzen.org/index.php/topic,150.msg34386.html#msg34386