Just check coupons out (with price alert and history). Do you want to know what the best price is?
Size: (L)X(W)X(H): 13.5X8X16.5cm/5.31”X3.14”X6.49” (appr.), Color: As the picture, Material: Plastic, Random songs: To Alices / Castle in the Sky / etc.
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Europe 
. Sorry, but there’s no price history in my database. You can get coupon down below.
Link: Banggood product page
1. ($14.39): BG6d78ac
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGMUSIC10, BGRCT10
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: $13.99.
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).