When you gave her eight HATS, SHE was happy.
八 (eight) + 月 (moon)
= 八月 (August)
eighth day of the month
八 (eight) + 日 (sun, day)
= 八日 (eighth day of the month)
八 (eight) + 重 (heavy / overlap) + 歯 (tooth)
= 八重歯 (gnarly teeth)
the gnarled, wish-I-had-braces teeth that Japanese are famous for. Lots of Japanese find it cute, in fact.