Quarter 3 affixes

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Across
  1. 2. Child like
  2. 3. Not able to do something
  3. 4. not related to the subject
  4. 6. To vanish
  5. 8. Two wheeled bike
  6. 9. Ten years
  7. 12. Not legal
  8. 13. Eight sided shape
  9. 14. Not mentally stable
  10. 15. Small meter
Down
  1. 1. Four sided shapes
  2. 5. Three wheeled bike
  3. 7. To be breaking the rules
  4. 10. Famous acapella group
  5. 11. One wheeled bike