Aliexpress
Click here… to search for Q50 Blue Kids Smartwatch on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (14.98 USD): elec
Coupon (14.98 USD): AFfbG10
(CouponsFromChina.com tip: coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Price history and price alert
Do you need price history chart (for all/most countries) for Q50 Blue Kids Smartwatch? There we go.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).