In the summer, we used to pick buttercups. You hold one under your chin, and the yellow light reflecting up off it tells you how much you love butter.
Bonus! Found these little brooches I made some time ago, also with a buttercup theme. If anyone would like one, send an email to firstname.lastname@example.org, and I’ll pop it in the post for you. I have 6/8 left.
Warning: Contains small, shiny parts; do not give to magpies or children under three.