try this website: [link]http://www.raidentech.com[/link] they are selling cheap mini subs. The X-sub is my favorite fish tank toy. It's very controllable & has a 1 hour playtime.
The Sea Explorer 2 mini sub has cool lights but has a short playtime of only 5-10 minutes. The control for the SE 2 mini sub is a little "fuzzy" for me. The fish in my aquarium tank are a little bit annoyed coz this mini sub moves a little too fast.