Our favorite afternoon was spent at the courtyard of Cocorico. It looks like it should be a movie set, because it's so picturesque. I'd love to have a garden like that! We did plenty of sampling the local cuisine, which was affordable, yet delicious.
The Rogale świętomarciński croissants have to be certified and receive a special poster or seal to authenticate it. Since they are traditionally eaten for St. Martin's Day (November 11th) they are quite heavy and more of a winter food, which may explain why they didn't seem advertised. We ended up finding them at a small pastry shop across from the Bernardyński Square market.
There were a lot of tiny markets dotting the city, which were fun to explore like the locals.
The produce was plentiful and beautiful and it did appear potatoes are as popular as could be expected with the popularity of pierogis.
Early in the evening, before the lantern festival began, we went to purchase our lanterns. Since they were attempting to achieve a Guinness World Record things were very regimented. We were only allowed to purchase as many lanterns as we had IDs, so that was 1 each for 5 złoty (4.25 złoty = 1 €). There were 10 colors to choose from, but we both opted for the classic white and we received a wrist band that showed our lanterns were "official".
Shortly before the main event people were selling "illegal" lanterns on the streets for 10 złoty, so I'd guess that even with the lanterns that were set off before the official time there were plenty more than official counts.
We didn't really care if it was part of the Guinness World Record for most lanterns simultaneously, we were simply happy to experience it regardless.
There were many firemen, paramedics, and safety measures put into effect. With the exception of several people who had to stomp their lanterns out after they caught fire, things seemed to go flawlessly.
The city didn't seem accustomed to having tourists, but everyone was very friendly. The odd thing is English is more readily used than German, even though Poland borders Germany.
Other things to do / see in Poznań:
We didn't have too much time to also visit Lake Malta or the Morasko meteorite nature reserve, because we were only there for a long weekend, although both would be at the top of my list if/when we get back.
I'm planning to try to make the Rogale świętomarciński when they are more seasonally appropriate. Hopefully the Auer Dult or one of the spice shops will have some of the essential white poppy seeds.
