I got some help from my Facebook friends with the French translation:
They decorated bags to tote their Valentines home in.
Despite using the heart stencil, Amelie said she was painting Cat in the Hat. Later, when she was talking about it, she said "kind of a Cat in the Hat."
She seemed excited to get the Valentine from her teacher, too. Amy gave her a turtle pin, which she wants me to clip on her shirt -- not her hair for some reason.