Ok this is driving me nuts please help!?

ok.. every other week my boyfriend's son from a one night stand stays with us... we have a 7 month old.. and this baby is 18 months old... *crazy i know* anyways... everytime we get him the kid is SICK... like today he has green snot coming out his nose, he throws everything up, and has a mive case of the runs... anyways... in previous weeks, i've just given up my toys that this baby has touched with his sick self, and bought new ones since they were cheap and what not.. but tonight, my boyfriend was too engrossed with the Wii and let his kid play with my fisher price kitchen.. now beings its a $70 toy i don't think it's able to be written off and tossed in the kids toybox.. i do a good job usually of keeping the toys seperated but how can i SAFELY disinfect my fisher price kitchen so my 7 month old can play with it? he puts his mouth on everything so i'm sketchy about bleach or clorox wipes or stuff along that line... plz help me