What toys are suitable for taking on the aeroplane?

hi im going on long flights to london from qld all together 4 flights just me with my near 2 yearold daughter, i have brought her her own travel bag and inside that ive brought new crayons a coulouring in book and plain paper as she loves to colour and draw, and a new small book she has no idea of the things that i have brought for her but id like a toy aswell that will not be too loud that may anoy others. she does not have a fave toy or comforter aprt from her dummy please help me with ideas thank you