Yeah, only if there was any ice on the lakes. Last winter there were two months of subzero. Then even the lake Balaton froze entirely so you could even walk across.
I hoped, that even if Balaton doesn't freeze, the nearby lake (Csónakázó-tó - Csótó) in Nagykanizsa would. Unfortunately the thickest ice we got this winter was about 3 mm.
I got all parts for the iceboat in the hardware store, and we also bought the wood so whenever the cold and ice arrives we can put it together in no time and be off sailing away. Unfortunatelly this didn't happen this winter, maybe the next.
Anyhow I'll post the parts and my plans: