There are many action figures and collectible Mario toys out there. If your kids really like Mario, I would suggest plush Mario toys or Mario action figures. They can use these to make up their own Mario games!
One can purchase vintage Mario action figures from the following stores: Amazon, Toys R Us, eBay, Target, Kijiji, Etsy, Mario Action Figure, to name a few.
you can buy the action figures at specific gaming and collectible shops such as Gamestop and Wallmart.
You could probably buy them online.
Ebay.
you can buy it on eBay or amazon
Amazon, ToyWiz, and ebay are great places to get Mario figures online. Toys R Us and WalMart are both nationwide locations that one can find Mario figures at.
Walmart
You can purchase Avatar action figures online from stores such as Toys 'R Us and Toywiz. You can also find Avatar action figures for sale from retailers such as Amazon.
Google Young Justice Action Figures and you'll find a plethora of places to purchase them.
www.homies.tv or sometimes in walmart
At. Toyrus