You can turn a motorcycle helmet into a space helmet with Littlebits.

Materials
Motorcycle Helmet
Coraplast or cardboard

Bits
2 power supplies
1 bright LED
1 microphone
1 speaker
2 wires

Tools
hot glue gun
tape
utility knife

Step 1: Mouth Cover

Cut out a shape like the one above. Practice with a cardboard or paper template first to get the right shape.
Then do the final plastic part from coraplast. The hole in the middle is the same diameter as the speaker.
Then tape or hot glue it into shape.

Step 2: Install Bits

The wires, power supply, battery, microphone, speaker go into the mouth cover as shown. You can tape them in with 2 sided tape or glue them very lightly! (Not too much glue)

Step 3:

Every helmet has a space between the outer shell and the soft inside. This is the place to slide the mouth cover. You will have to trim and adjust it to fit your helmet and face.

Important: the microphone should be very close to your mouth, this will make the cool distorted "Houston...we have a problem.." sound