Cafago offers the Mini GPS Locator for Kids for $38.66. Coupon code "J2379U" cuts it to $28.19. With free shipping, that's $30 off and the lowest price we could find. It features IP67 rated water resistance and an SOS button.
Note: This item ships from China and may take up to two weeks to arrive.
Most taxpayers will see their tax bill go down during 2018. That could impact which type of account -- traditional or Roth -- makes sense for you.