Since dec 2012, a small French startup is selling a city map carpet for kids. Choose your area in OSM slippymap, 2 clics and the customized carpet will be produced just for you. Cost is 59€ + transport. Colours and zoom are optimized for kids playing with their toys. Carpet size is 128x80cm.
NB: website internationalisation is planned. More customization too (e.g. colours). For each sale, 1€ is donated to French OSM-fr local chapter. They already received complains from parents that street names are not printed ! Hey, dad, it's for your kid, not for you :-)