Japanese shaved ice with sweet azuki beans. This is my favorite dessert. "Natsukashii" is kind of like an intense form of nostalgia, in Portuguese, a similar word exists, "saudades," and this is one of the most impactful emotions I think we feel.
Wagashi (tea confectionery) made to represent spring water and sakura (cherry) blossoms. The artist is trying to give you the "feeling" you might have if you were watching blossoms floating in the fresh spring water as you sip your tea.