Piko tracks are pretty compatiple with Playmobil trains as everything they make is G scale - however i don't entirely recomend the buildings - they're expensive and (since they're not toys but rather a make-it-yourself oriented hobbie) it takes forever to put one together and you can't make many modifications - sometimes (if not always) glue and alike stuff are required (not to mention the intruction sheets i've seen are a pain in the neck b/c they do not have colors) and some pieces are very fragile...very disappointed with my first Piko set, especially because it's a German brand and my expectations were big