I hope I don't need to remind you to stock up on batteries for those electronic toys! Right now on Amazon, you can get a 48-count box of Maxell AA Alkaline batteries for just $10.95 when you order with Subscribe and Save.
A box of 36 Maxell AAA Alkaline batteries is just $8.68 after your Subscribe & Save discounts
I've used Maxell batteries on on various devices for years. I think they work just fine, and this price is better than the cheap, low-performing batteries I always find at my local dollar stores!
Remember, you're under no obligation when you order with Subscribe and Save. Amazon often offers discounts if you order with Subscribe & Save, but you can cancel the subscription any time after your order ships. Taking advantage of S&S is a great way to get rock bottom prices. I always select a 6-month subscription, then, after my order ships, I log into Amazon, head to My Account and click on Manage Subscribe & Save to cancel the subscription.