I just did seasons and associated vocabulary (4 lessons) at my nurseries here in Japan. These are the 28 flashcards I used (4 x season FCs and 6 x FCs for each season). Because they are very young learners, the letters are all in upper case. We are trying to teach them the upper case characters, initially. It's geared toward young Japanese and the things they see here in the four seasons. I put the season FCs in 4 corners of the classroom, held up a vocabulary card, they ran to whatever season they thought it was. Then we did listen and repeat (for the FC I showed), and I gave them the correct answer. A very basic activity, but they loved it. We also did bowling. 2 teams took turns trying to hit the (standing) season FC that corresponded to the vocabulary FC that I'd just showed. They threw a die for points if they could hit the target. Hopefully, your kids can enjoy a similar style activity with these FCs...cheers!