We do a lot of interactive learning here. Dd will be 3 in September and has NO idea about colors - she just picks a color when I ask what color something is. SO we cut out some character to help her learn a few colors at a time.
ELMO - redCookie Monster - Blue
Oscar the Grouch - green
I have a Big Bird cut for yellow - but don't have yellow vinyl for the window - SO I'm going to cut it in black and layer with yellow paper - just need to get it done.
DD loved this - she goes up to it in the morning and asks what color each one are now.
I used my Cricut Sesame Street Cartridge for the characters - all are cut in vinyl (some Wall pops from Lowes). The words were from my Cuttin Up cartridge cut at 2 1/4".