V.T.
My daughter isn't in a booster yet, but when we fly, she is in a seat with no car seat. I bring her Pillow Pet along with us and she snuggles up to the pillow pet and falls asleep. Her head is tilted to the side, but it doesn't flop around and she loves her pillow pet so she is bringing a toy with her at the same time. It might help in the booster.