What a great idea.....Design your own Mosaic Game Board :-)
This is a great kit for kids, requires no cutting and no tools
 
This Mosaic KIT INCLUDES: 
  40 x 40 cm mosaic base 
 Mosaic tiles
Mosaic Glue
 Grout
Video link to instructions
 
** game peices NOT included...but the ones pictures were hand sculpted by the artist using fimo :-) (perhaps another kit for that product?!)