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和菓子
At Hiromi's in VII 22 we made たんざくねりきり, which was a ball of あんこ wrapped in green and then white paste. Then a bamboo stalk was drawn in, and some よかん or かんてん shaped like the little wish cards people hang for 七夕 applied.
御名
夏の雲（なつ の くも）
Fishing あゆ (especially fitting if you use sweets shaped like あゆ)
ほし祭 (old name for 七夕)
some places in Japan have a 風鈴祭り（ふうりん まつり）, a wind bell festival. So maybe 風鈴 is a good 御名?