Ages Three and Up is an online retailer specializing in collectible action figures, model kits, and pop-culture merchandise, with a strong focus on Transformers. Its extensive catalog spans Hasbro and Takara releases, including Masterpiece, Generations, Studio Series, War for Cybertron, vintage figures, and other Transformers lines. The store also carries products from numerous third-party Transformers makers, alongside non-Transforming figures and collectibles from brands such as Flame Toys, Hot Toys, Kotobukiya, Revoltech, Threezero, and Super7. Additional categories include Robotech and Macross, Nanoblock, Bearbrick, and Beast Saga figures.

Customers can browse new arrivals, preorders, restocks, reissues, exclusive products, and items available for reservation. Ages Three and Up highlights limited-run and retailer-exclusive releases, including convention exclusives, and offers gift cards and a wishlist feature. Its website provides shopping tools such as product comparisons, account and cart access, and customer support resources, including FAQs and contact information. The retailer also shares product and sale updates through its newsletter and social media channels.