Dendy Junior II Famicom Clone
The Box for this claims "10,000,000" Game Built In - there are in fact only about 8 'unique' games and the other numbers are duplicates or level start hacks.
Interestingly enough we recently had some visitors at my work in London from Tajikistan (a former Soviet Union country) and one of these guys wanted to go and buy some 'Dendy Games'. I asked our Russian translator what she knew about 'Dendy' Games and she said that children everywhere in the former soviet states played "Dendy".
I've since been told in email that Dendy made the cheapest and most popular video game in the former USSR (basic famicom clone). The name "Dendy" has now entered into common speak as a generic term used to describe all home video games.
Study Box SBX-01 Famicom Tapeunit on Family Computer WN-486 Famicom Clone
This is a weird unit - a Tape player that plugs into a Famicom and appears to allow for loading of 'something' from tape.
If you power it up you get a nice loading screen (similar to a SNES copier interface) but as I've not got any tapes for this its as far as I've got.
The loading screen reports (C) Fukutake Publishing Co Ltd AVES Ver 1.0
As the 'Fukutake Publishing Co. are one of Japans largest makers of home education study courses (they have a web site)
my guess is that this is some sort of study aid or is used with some home study course.