first your going to need a bottom piece at least 10 by 8 and put on a double slope and next to it put on a single slope 2 from either sides
Step 2: Step 2
then you have to make a piece that is 3 by 4 2 layers high and covered in flats. then put it next to the slopes so that it is flush with the back.
Step 3: Step 3
then you need to make a piece like this that has a 2 by 2 hole in it so the outer border is 4 by 4 and put flats all around the sides except 2 middle ones. then get a 2 by 6 thin piece and cover with flats join the front of the 2 by 6 to the 4 by 4 square with hole in it where their are no flats.
Step 4: Step 4
then put bricks all around the outside to make walls but have a gap where the m&ms come out of. dont forget to put the square flat where it shows you because it makes the mechanism slide.
Step 5: Step 5
put the next layer of bricks on that will cover the mechanism which is the 4 by 4 with hole in it with the 6 by 2. to put that in it have the square in the box with the 6 by 2 out of the box as you can see in the pic. now it should be 5 layers up with the part where you can pull out the side on the 4th ;layer
Step 6: Step 6
make a piece that is a 2 by 4 joined with a 1 by 2 and put it in the inside as shown. to put the 2 pieces together put the 1 by 2 on the under side of the 2 by 4 in the middle up the back
Step 7: Step 7
then put another layer on the top so it is in line with the piece that you put on in the step before. put the layer on so that it looks like this