Most toy gyroscopes are started with string. That's the way it has been done for over 100 years. Sadly sometimes the string can wear and break. That is a pain. So we are introducing Kevlar string! Same stuff that is used for bullet proof vests and army helmets.
Warning Kevlar is super strong and unforgiving. Don't let the Kevlar slip through your hands. It could easily cut through your hand.
Supplied as about a 90cm length.