Cover your cereal box with the yellow paper.
Cut a hole in the back of the box (or the top of the box) with a box cutter or X-acto knife (this may be a job for mom or dad). Be sure to make it wide enough to slip the cards through.
Cut out three sets of circles. I traced everyday objects to make them...mason jar lids for large white circles (but you can also just use a glass), a shot glass for the brown circles and a quarter for the small black ones.
Glue the eyes on onto the cereal box. Add small dots of white craft foam (or white paper) to the black part of the minion's eye to create a reflection.
To make the minions goggles, use hot glue to glue mason jar lids over the eyes. Be sure the lids come together in the middle. If you don’t have mason jar lids, you can roll up some aluminum foil (like a snake), then curve it into two circles and use them instead.
Use a ruler to make a strip of black craft foam about 1" wide for a goggle strap.
Measure the distance around the sides and cut the strips to the length you need. You can go all the way around the box or just cover the sides. You’ll also want to cut one end of each strip slightly curved in order to fit around the mason jar lids
Glue the strips to the box.
Cut a black piece for the mouth and white pieces for the teeth.
I found the easiest way to do the teeth was to glue them in position, then trim the extra parts off afterwards.
Glue the mouth to the Minion's face.
Cut your Minion's overalls out of blue craft foam. You can use this tracer to make it easier but you may have to adjust it slightly if you used a different sized box than I did. Use a marker to make the “logo” in the middle of the overalls. I found it easiest to make a circle first, then add a diamond in the middle.
Your finished logo will look something like this.
Glue the overalls to the cereal box.
Now all that's left is to collect those Valentine cards!