The Happy Puzzle Company Colour Block Puzzle Game

Colour Block - 100 coloured circles...only the ten you need must remain.  100 coloured circles sit inside a series of grids, 18 shaped blocks will together cover 90 of the circles.  With each of the 45 multi-level puzzles, your task is to use a combination of logic and spatial awareness to ensure that once all of the blocks are in place, only the ten circles you need to complete the challenge remain uncovered.  For 1 player, age 8+