Activity trackers make some of the best gifts for active moms, and just in time for Mother’s Day on May 8, you can purchase one for a fraction of the original price. Through May 3, fitness enthusiasts can save up to 25% on select Fitbit gifts, including activity trackers and accessory bands. Take a look at some of the deals: Fitbit Flex for $79.95 (regularly $99.95) Fitbit Charge HR for $129.95 (regularly $149.95) Up to 25% off accessory bands » MORE: Fitbit Alta vs.