Put 21 disks into the squre side by side in the middle square (without using force). They do indeed fit, but it is not easy to find a fitting configuration.
Technischen Sammlungen Dresden
+49 - 351 - 488 7272
The Adventureland Mathematics is part of a municipal technology museum: Technische Sammlungen Dresden.
The museum can easily be reached by car as well as by public transport, i.e., bus and tram. For the latter, the tram lines 4 and 10 and the bus line 61 are suitable. For further information you may want to consult the website of Dresden's public transportation DVB (currenly in German only). The bus and tram stops closest to the venue are named Pohlandplatz, Technische Sammlungen.
Tuesday - Friday: 9 a.m. - 17 p.m.
Saturday, Sunday and feast day: 10 a.m. - 18 p.m.
Ticket prices: 5 Euro / cut 4 Euro