my foot wiggles

At lunch Hannah was sitting on her knees so she could reach the table. (She thinks she is too big to sit in a highchair.) All of the sudden she got this strange look on her face. She said,"My foot wiggles, take my shoe off." I picked her up and took off her shoe, thinking maybe she had a bug in it from being outside this morning. There was nothing, so I took her sock off. She said, "It is wiggling." I finally figured out that it is tingling, because it was asleep. We convinced her to sit in a booster seat so her foot would not "wiggle" any more.